Words That Start With U

Words That Start With U (With Definitions)

What words start with a U?

The letter ‘U’ is the initial letter of many words in the English language. They range from short and common words, to longer, more specialized terms.
 
Here’s a diverse selection across various lengths and complexity:
 
2 Letter Words That Start With U
  • Uh: An expression of hesitation.
  • Um: An expression of doubt or uncertainty.
  • Un: One; used in card games and dice.
  • Up: In or to a higher position or level.
  • Us: Refers to the speaker and one or more other people.
  • Ut: A musical note, now replaced by ‘do’ in the solf├Ęge scale.

3 Letter Words That Start With U

  • Udo: An Asian plant of the parsley family.
  • Ugh: An expression of disgust or horror.
  • Uhf: Ultra High Frequency, a range of radio frequencies.
  • Uke: Short for ukulele, a small stringed musical instrument.
  • Ule: A type of rubber derived from a tropical American tree.
  • Ulu: An Inuit woman’s knife with a crescent-shaped blade.
  • Urn: A type of vase, typically used to hold ashes of the deceased.
  • Use: To employ for a specific purpose.

4 Letter Words That Start With U

  • Uber: Beyond; super. Also refers to the ride-sharing company.
  • Udon: A type of thick wheat noodle popular in Japanese cuisine.
  • Udos: Plural of udo, an Asian plant of the parsley family.
  • Ughs: Plural form of “ugh”, an expression of disgust or horror.
  • Ugly: Unpleasant to look at; not attractive.
  • Ukes: Plural form of uke, short for ukulele.
  • Ulva: A type of green seaweed.
  • Unit: A single thing or person.

5 Letter Words That Start With U

  • Udder: The mammary gland of female cattle or other mammals.
  • Uhlan: A lancer in a European light cavalry unit.
  • Uhuru: Swahili for “freedom”; also refers to Kenyan independence from British rule.
  • Ukase: An edict or order from a Russian government authority.
  • Ulama: Muslim scholars who are recognized as having specialist knowledge of Islamic sacred law and theology.
  • Ultra: Beyond; excessive.
  • Usual: Commonly encountered, typical.

6 Letter Words That Start With U

  • Uakari: A type of New World monkey with a bald face and long hair elsewhere.
  • Ubiety: The condition of being in a specific place.
  • Ubique: Everywhere; omnipresent.
  • Udders: Plural of udder.
  • Uglier: Comparative form of the adjective “ugly.”
  • Uglify: To make ugly.
  • Uglily: In an ugly manner.
  • Ugsome: Loathsome or horrid.
  • Uhlans: Plural of Uhlan.
  • Ukases: Plural of Ukase.
  • Ulcers: Open sores on the body.
  • Ullage: The space not filled with liquid in a container, especially a wine bottle.
  • Ulster: A type of long, loose overcoat.
  • Ultima: The last syllable of a word.
  • Ultimo: In the last month.
  • Ultras: Extreme supporters, especially in sports.
  • Umbels: Plural of Umbel; a flower cluster.
  • Umbers: Natural pigments.
  • Umbles: The edible entrails of an animal, especially those of a deer.
  • Umbrae: Plural of Umbra; the fully shaded inner region of a shadow.
  • Umbral: Pertaining to the umbra.
  • Umlaut: The two dots placed over a vowel in some German words.
  • Ummahs: Plural of Ummah; the whole Muslim community.
  • Umphed: To express doubt or hesitation.
  • Umping: The act of serving as an umpire.
  • Umpire: A person who has the authority to make judgments or determinations.
  • Umrahs: Plural of Umrah; a pilgrimage to Mecca, smaller than the Hajj.
  • Umteen: An indefinitely large number.
  • Unable: Not able to do something.
  • Unaged: Not aged; young.
  • Unarms: Disarms or removes weapons.
  • Unavid: Not avid; lacking enthusiasm or eagerness.
  • Unawed: Not awed; not filled with wonder, fear, or reverence.
  • Unbait: To remove bait from.
  • Unbars: Opens by removing a bar or barrier.
  • Unbelt: To remove a belt from oneself or another.
  • Unbend: To straighten out from a bent position.
  • Unbent: Not bent; straight.
  • Unbind: To release from bindings or restraints.
  • Unbled: Not bled; not having blood drawn.

7 Letter Words That Start With U

  • Ufology: The study of unidentified flying objects (UFOs).
  • Ugliest: Superlative form of the adjective “ugly.”
  • Ukelele: An alternative spelling for “ukulele”, a musical instrument.
  • Ukulele: A small four-stringed guitar of Hawaiian origin.
  • Ulexite: A mineral often referred to as “TV rock” because of its unique optical properties.
  • Ullaged: Pertaining to ullage; having some empty space.
  • Ullages: Plural of Ullage.
  • Ulpanim: Hebrew language schools in Israel.
  • Ultimas: Plural of Ultima; the last syllable of a word.
  • Ultisol: A type of soil typical of warmer regions that often has a subsoil rich in clay.
  • Ululant: Wailing; mournful.
  • Ululate: To howl or wail loudly.
  • Umbered: Covered or tinged with umber, a natural brown pigment.
  • Umbonal: Pertaining to the umbone, the pointed, central part of a shell.
  • Umbones: Plural of umbone.
  • Umbonic: Of or relating to the umbone.
  • Umbrage: Offense or annoyance.
  • Umlauts: Plural of Umlaut; the two dots over a vowel.
  • Umphing: The action or sound of expressing doubt or hesitation.
  • Umpired: Acted as an umpire.
  • Umpires: Plural of Umpire; individuals who judge sports games.
  • Umpteen: Indefinitely many; a lot.
  • Unacted: Not acted upon.
  • Unadded: Not added.
  • Unadult: Not adult; immature.
  • Unagile: Not agile; clumsy.
  • Unaided: Without any help or assistance.
  • Unaimed: Not aimed.
  • Unaired: Not broadcasted or ventilated.
  • Unalike: Not alike; different.
  • Unaptly: In an unsuitable manner.
  • Unarmed: Without weapons.
  • Unasked: Not asked or inquired.
  • Unawake: Not awake.
  • Unaware: Having no knowledge of a situation or fact.
  • Unbaits: Removes bait from.
  • Unbaked: Not baked.
  • Unbased: Lacking a foundation or basis.

8 Letter Words That Start With U

  • Ubieties: The quality of being everywhere at the same time; omnipresence.
  • Ubiquity: The state of being everywhere or widespread.
  • Uglified: Made ugly.
  • Uglifies: Makes ugly.
  • Ugliness: The state or quality of being ugly.
  • Uintaite: A mineral pitch found in the Uinta Valley, Utah.
  • Ukeleles: Plural of ukelele, a variant spelling of ukulele.
  • Ukuleles: Plural of ukulele, a small musical instrument.
  • Ulcerate: To form an ulcer; to become ulcerous.
  • Ulcerous: Affected with, or as if with, an ulcer or ulcers; ulcerative.
  • Ulexites: Plural of ulexite, a mineral.
  • Ulterior: Hidden or beyond what is obvious.
  • Ultimacy: The state or quality of being ultimate or final.
  • Ultimata: Plural of ultimatum, a final demand or proposition.
  • Ultimate: Last in a progression or series; final.
  • Ultisols: Soils found primarily in humid temperate or tropical regions.
  • Ultradry: Extremely dry.
  • Ultrahot: Extremely hot.
  • Ultraism: Extreme views or actions.
  • Ultraist: One who holds extreme views.
  • Ultranet: Ultra-fine net or network.
  • Ultrared: Beyond the red part of the spectrum; infrared.
  • Ululated: Made a howling or wailing noise.
  • Ululates: Howls or wails.
  • Umbellar: Of or relating to an umbel, a type of inflorescence.
  • Umbellet: A secondary umbel in a compound umbel.
  • Umbering: Coloring with or as with umber.
  • Umbilici: Plural of umbilicus; navels.
  • Umbonate: Having a raised area resembling a button.
  • Umbrages: Plural of umbrage, offense or annoyance.
  • Umbrella: A device for protection against rain or sun.
  • Umbrette: A shade for a lamp or light.
  • Umeboshi: Japanese pickled ume fruits.
  • Umlauted: Having an umlaut or modified sound.
  • Umpirage: The office, function, or jurisdiction of an umpire.
  • Umpiring: Acting as an umpire; refereeing.
  • Umteenth: Indefinitely numerous; very many.
  • Unabased: Not abased; not lowered in rank, status, or esteem.
  • Unabated: Continuing at full strength or intensity.
  • Unabject: Not abject; not degraded or lowly.
  • Unabused: Not misused or mistreated.
  • Unaching: Not aching; free from pain.

9 Letter Words That Start With U

  • Ubiquitin: A small protein that tags proteins to be degraded in the cell.
  • Ufologies: Plural of ufology; the study of unidentified flying objects.
  • Ufologist: Someone who studies unidentified flying objects.
  • Uglifying: Present participle of uglify; making something look unattractive or unpleasant.
  • Uintahite: Another term for uintaite, a mineral pitch.
  • Uintaites: Plural of uintaite.
  • Uitlander: A foreigner, especially a British resident in the former republics of the Transvaal and Orange Free State in South Africa.
  • Uitwaaien: A Dutch term meaning to walk in the wind.
  • Ulcerated: Affected with an ulcer or ulcers.
  • Ulcerates: Third person singular of ulcerate; to develop ulcers.
  • Uliginose: Swampy; marshy.
  • Uliginous: Marshy; relating to marshes.
  • Ultimates: Plural of ultimate.
  • Ultimatum: A final statement of terms made by one party to another.
  • Ultrachic: Extremely chic or stylish.
  • Ultracool: Extremely cool or fashionable.
  • Ultradian: Referring to recurrent periods or cycles that are less than 24 hours.
  • Ultrafast: Faster than is usual or expected.
  • Ultrahigh: Extremely high.
  • Ultraisms: Plural of ultraism; extreme views or measures.
  • Ultraists: Plural of ultraist; one who holds or supports extreme views or measures.
  • Ultraleft: Far-left politically; or extreme left-wing.
  • Ultranets: Plural of ultranet.
  • Ultrapure: Extremely pure.
  • Ultrarich: Extremely rich or wealthy.
  • Ultrasafe: Extremely safe.
  • Ultraslow: Very slow.
  • Ultrasoft: Extremely soft.
  • Ultrathin: Extremely thin.
  • Ultrawide: Much wider than the average or usual.
  • Ululating: Making a howling or wailing sound.
  • Ululation: A howling or wailing sound.
  • Umbellate: Bearing or arranged in umbels.
  • Umbellets: Plural of umbellet; smaller umbel in a compound umbel.
  • Umbellule: A secondary or small umbel in compound umbels.
  • Umbilical: Related to the navel or the umbilical cord.
  • Umbilicus: The navel; the center or middle of something.
  • Umbrellas: Plural of umbrella.
  • Umbrettes: Plural of umbrette.
  • Umlauting: Present participle of umlaut; modifying a vowel sound.
  • Umpirages: Plural of umpirage; the role or jurisdiction of an umpire.
  • Unabashed: Not embarrassed or ashamed.
  • Unaltered: Not changed or modified.
  • Unamended: Not modified or revised.
  • Unanimous: In complete agreement.
  • Unappeased: Not satisfied or pacified.
  • Unassuming: Modest, without pretensions.
  • Unattached: Not connected or affiliated.
  • Unattended: Not watched over or supervised.
  • Unavenged: Not avenged or retaliated for.
  • Unawakened: Not aroused or activated.
  • Unbalanced: Not in equilibrium; or mentally unstable.
  • Unbearable: Impossible to endure or tolerate.
  • Unbeatable: Impossible to defeat.
  • Unbeknown: Without the knowledge of someone.
  • Unbeliever: A person who does not believe, especially in religious matters.
  • Unbendable: Not capable of being bent.
  • Unbeatable: Cannot be overcome or surpassed.
  • Unblinking: Not blinking; or showing no sign of shock or surprise.
  • Unblockade: To remove a blockade from.
  • Unborrowed: Not borrowed or taken from another source.
  • Unbranched: Not having branches.
  • Unbridled: Lacking restraint or control.
  • Unbruised: Not harmed or hurt.
  • Unbuckling: Undoing or opening a buckle.
  • Uncannily: In a way that’s strange or mysterious.
  • Unceasing: Never stopping; continuous.
  • Uncensored: Not having any part removed or suppressed.
  • Unchanged: Remaining the same.
  • Uncharted: Not mapped or surveyed.
  • Unchecked: Not examined or inspected.

10 Letter Words That Start With U

  • Ubiquitary: Being everywhere at once; omnipresent.
  • Ubiquities: Plural of ubiquity.
  • Ubiquitins: Plural of ubiquitin.
  • Ubiquitous: Present, appearing, or found everywhere.
  • Ufological: Relating to ufology, the study of unidentified flying objects.
  • Ufologists: Plural of ufologist.
  • Uglinesses: Plural of ugliness.
  • Ugsomeness: The state or quality of being ugsome or loathsome.
  • Uintahites: Plural of uintahite.
  • Uintathere: A large prehistoric mammal of the Eocene epoch.
  • Uitlanders: Plural of uitlander.
  • Uitwaaiens: Plural of uitwaaien.
  • Ulcerating: Present participle of ulcerate; developing ulcers.
  • Ulceration: A sore on the skin or mucous membrane.
  • Ulcerative: Causing, characterized by, or affected with ulcers.
  • Ulcerously: In an ulcerous manner.
  • Ulteriorly: In a manner that is intentionally hidden or not obvious.
  • Ultimacies: Plural of ultimacy.
  • Ultimately: In the end; finally.
  • Ultimatums: Plural of ultimatum.
  • Ultrabasic: Referring to igneous rocks that have a very low silica content.
  • Ultraclean: Extremely clean.
  • Ultrafiche: A microfiche of very high resolution.
  • Ultraheavy: Extremely heavy.
  • Ultrahuman: Beyond human; superhuman.
  • Ultraistic: Extremely altruistic.
  • Ultralarge: Very large in size.
  • Ultralight: Extremely light.
  • Ultramafic: Referring to igneous rocks with very low silica and high magnesium and iron content.
  • Ultrarapid: Extremely rapid or fast.
  • Ultraright: Extremely right-wing or conservative.
  • Ultrasharp: Extremely sharp.
  • Ultrashort: Extremely short.
  • Ultrasmall: Very small in size.
  • Ultrasmart: Extremely smart or intelligent.
  • Ultrasonic: Relating to sound waves with a frequency above the range audible to the human ear.
  • Ultrasound: Sound or other vibrations having an ultrasonic frequency, particularly as used in medical imaging.
  • Ululations: Plural of ululation.
  • Umbellules: Plural of umbellule.
  • Umbilicals: Plural of umbilical.
  • Umbilicate: Resembling or related to the navel; depressed in the center, like a navel.
  • Unabatedly: Without any reduction in intensity or strength.
  • Unadjusted: Not altered to fit particular needs or circumstances.
  • Unadulterd: Not mixed or diluted with any different or extra elements.
  • Unaffected: Not influenced or changed by something; also can refer to sincere demeanor.
  • Unambiguous: Clear and without uncertainty.
  • Unanimously: In complete agreement.
  • Unannounced: Without any prior notice or warning.
  • Unanswered: Not responded to.
  • Unappeased: Not brought to a state of peace or contentment.
  • Unapproved: Not having been confirmed or accepted.
  • Unarguable: Impossible to dispute or doubt.
  • Unassisted: Without help or intervention.
  • Unattached: Not joined or linked to anything else.
  • Unattended: Not taken care of or looked after.
  • Unattractive: Not pleasant to look at; not appealing.
  • Unauthentic: Not genuine or real.
  • Unavailable: Not able to be used or obtained.
  • Unavoidable: Impossible to prevent or avoid.
  • Unbalanced: Not in proportional arrangement, mentally unstable or not fair.
  • Unbelievers: Those who reject belief, especially in the major tenets of a religion.
  • Unbelieving: Not believing; skeptical.
  • Unbleached: Not whitened by chemical, physical, or natural agents.
  • Unblemished: Not damaged or marked in any way; perfect.
  • Unbreakable: Impossible to break, especially under normal conditions.
  • Unbridled: Uncontrolled or unrestricted.
  • Unburdened: Relieved of something that oppresses or worries.
  • Unbuttoned: Not fastened with buttons; also can refer to a relaxed manner.
  • Uncertainty: The state of being unsure or not knowing.
  • Unchallenged: Not questioned or disputed.
  • Unchanging: Remaining the same.

11 Letter Words That Start With U

  • Ulcerations: The process or condition of becoming ulcerated, often referring to open sores on an organ or tissue.
  • Ulcerogenic: Capable of causing or producing ulcers.
  • Ulotrichous: Having woolly or crisply curly hair.
  • Ultracasual: Extremely casual; beyond the normal level of informality.
  • Ultrafilter: A filter designed to remove very fine particles or contaminants from liquids or gases.
  • Ultralights: Very light and small aircraft that carry one or two people.
  • Ultramarine: A deep blue pigment originally made by grinding lapis lazuli into powder.
  • Ultramodern: Extremely modern and advanced in ideas or methods.
  • Ultrasimple: Extremely simple; lacking complexity.
  • Ultrasonics: The study and application of sound waves beyond human hearing range.
  • Ultrasounds: Sound waves with a frequency higher than the upper limit of human hearing, often used in medical imaging.
  • Ultraviolet: Electromagnetic radiation with a wavelength shorter than that of visible light but longer than X-rays.
  • Ultravirile: Extremely masculine or virile.
  • Umbellately: In a manner resembling or related to an umbel, a type of inflorescence.
  • Umbellulate: Having small or secondary umbels.
  • Umbilically: In relation to or resembling an umbilicus or navel.
  • Umbilicated: Having a navel or depression like a navel.
  • Umbriferous: Giving or casting shade.
  • Unabandoned: Not abandoned; still maintained or kept.
  • Unabashedly: Without embarrassment or shame.
  • Unabatingly: In a manner that does not lessen or subside.
  • Unabolished: Not abolished or done away with.
  • Unabrogated: Not annulled or repealed.
  • Unabsorbent: Not able to absorb or soak up moisture.
  • Unabsorbing: Not engrossing or taking one’s attention.
  • Unabusively: In a manner that is not abusive.
  • Unacclaimed: Not acknowledged or praised.
  • Unaccounted: Not explained or accounted for.
  • Unaccusable: Impossible to accuse or blame.
  • Unaccustomed: Not familiar or usual; out of the ordinary.
  • Unachievable: Impossible to achieve.
  • Unacquainted: Not familiar with someone or something.
  • Unaffiliated: Not officially attached or connected to an organization.
  • Unaffordable: Too expensive to be afforded or bought.
  • Unalienable: Impossible to take away or give up.
  • Unallocated: Not distributed or given out.
  • Unalterable: Not able to be changed.
  • Unambiguous: Clear without any uncertainty.
  • Unanimities: The state of being unanimous.
  • Unannounced: Without any prior notice or warning.
  • Unanswerable: Impossible to answer.
  • Unapologetic: Not sorry or ashamed.
  • Unappetizing: Not appealing or inviting to eat.
  • Unarguable: Impossible to dispute or doubt.
  • Unassailable: Unable to be attacked, questioned, or defeated.
  • Unassertive: Not confident or forceful.
  • Unassigned: Not given a particular job or role.
  • Unassociated: Not connected; standing alone.
  • Unattainable: Impossible to achieve.
  • Unattractive: Not pleasant to look at.
  • Unauthorized: Not having official permission or approval.
  • Unbelievable: Impossible to believe.
  • Unbelieving: Not believing; skeptical.
  • Unblemished: Not damaged or marked in any way.
  • Unbreakable: Impossible to break

12 Letter Words That Start With U

  • Ubiquitously: In a manner that is present everywhere.
  • Uglification: The process of making something ugly.
  • Ulcerousness: The state or quality of having or resembling ulcers.
  • Ultimateness: The quality of being ultimate or final.
  • Ultracareful: Extremely careful or cautious.
  • Ultrafilters: Filters that remove very small particles from a substance.
  • Ultraleftism: Extreme left-wing political beliefs or principles.
  • Ultraliberal: Extremely liberal in political or social beliefs.
  • Ultramarines: Bright blue pigments made from powdered lapis lazuli.
  • Ultramontane: Referring to the pope’s authority or the region beyond the mountains, typically the Alps.
  • Ultramundane: Beyond the known world or universe.
  • Ultraprecise: Extremely precise or accurate.
  • Ultraradical: Extremely radical in beliefs or actions.
  • Ultrarefined: Refined to an extreme degree or purity.
  • Ultraviolent: Extremely violent.
  • Ultraviolets: Refers to ultraviolet radiation, a type of electromagnetic radiation.
  • Umbilication: A small depression or navel-like scar.
  • Umbrageously: In a manner that causes offense or resentment.
  • Umbrellabird: A bird, native to Central and South America, known for its umbrella-like crest.
  • Umbrellalike: Resembling an umbrella.
  • Unabandoning: Not giving up or abandoning.
  • Unabsorbable: Not able to be absorbed.
  • Unabstracted: Not abstracted or removed.
  • Unacademical: Not related to or characteristic of academia or scholarly pursuits.
  • Unacceptable: Not satisfactory or allowable.

13 Letter Words That Start With U

  • Uglifications: Processes or acts of making something ugly.
  • Ultracasually: In an extremely casual manner.
  • Ultracautious: Being extremely cautious or careful.
  • Ultracritical: Extremely critical or judgmental.
  • Ultrafamiliar: Excessively familiar, to the point of being inappropriate.
  • Ultrafeminine: Extremely feminine.
  • Ultrafiltered: Having been passed through an ultrafilter, which removes very small particles.
  • Ultrafiltrate: The liquid or solution that has passed through an ultrafilter.
  • Ultraleftisms: The doctrines or practices of extreme left-wing ideologies.
  • Ultraleftists: Individuals who advocate or belong to extreme left-wing ideologies.
  • Ultraliberals: Extremely liberal individuals.
  • Ultramarathon: A running race longer than the traditional marathon length of 26.2 miles.
  • Ultramilitant: Extremely militant or combative.
  • Ultramontanes: Supporters of the authority of the Pope over national churches or people living in a region beyond mountains.
  • Ultranational: Relating to extreme nationalism.
  • Ultraorthodox: Strictly adhering to traditional teachings, especially in religion.
  • Ultrapowerful: Extremely powerful.
  • Ultraradicals: Extremely radical people or ideas.
  • Ultrararefied: Extremely or excessively refined.
  • Ultrarational: Beyond or surpassing what is rational.
  • Ultrarealisms: Art forms or beliefs that go beyond usual realism.
  • Ultrarealists: Advocates or practitioners of ultrarealism.
  • Ultrareliable: Extremely reliable or dependable.
  • Ultrarightism: The doctrines or practices of extreme right-wing ideologies.
  • Ultraromantic: Excessively romantic.
  • Ultraroyalist: An extreme supporter of a monarch or monarchical principles.
  • Ultratropical: Beyond or exceeding what is tropical.
  • Ultravirility: Excessive virility or manliness.
  • Umbelliferous: Bearing flowers in an umbel; relating to plants with such flower structures.
  • Umbilications: Depressions or navel-like formations.
  • Umbrellabirds: Birds native to Central and South America, known for their umbrella-like crests.
  • Umbriferously: In a manner that produces or is associated with shade or shadow.
  • Unabbreviated: Not shortened or contracted.
  • Unaccelerated: Not quickened or made faster.

14 Letter Words That Start With U

  • Ubiquitousness: The state of being present everywhere.
  • Ultrapatriotic: Extremely patriotic.
  • Ultrarealistic: Beyond what is realistic, often referring to a form of art.
  • Ultrareligious: Extremely religious.
  • Ultrasensitive: Extremely sensitive.
  • Ultrasonically: Pertaining to or utilizing ultrasonics (frequencies above human hearing).
  • Ultrastructure: The fine detail of a cell as seen under an electron microscope.
  • Unaccommodated: Not suited or adapted, or not provided with something needed.
  • Unaccountablely: In an unexplainable manner.
  • Unacknowledged: Not recognized or admitted.
  • Unadulteratedly: In a pure and unaltered manner.
  • Unadventurously: In a manner lacking adventure or risk.
  • Unambiguously: In a manner that is clear and without uncertainty.
  • Unappreciative: Not showing gratitude or appreciation.
  • Unapproachable: Not easily approached, reached, or friendly.
  • Unascertainable: Not able to be found out or understood.
  • Unassumingly: In a modest manner without presumption.
  • Unbelievability: The quality of being hard to believe.
  • Unbelievably: To a degree or extent that’s hard to believe.
  • Unblemishedly: In a manner without blemish or defect.
  • Unchangeability: The quality of not being capable of change.
  • Uncharacterized: Not described or defined with distinctive features.
  • Uncircumcision: The state of not being circumcised, often in a religious or cultural context.
  • Unclimbability: The quality of being difficult or impossible to climb.
  • Uncommensurable: Not able to be judged by the same standard as something; immeasurable.
  • Uncommunicative: Not inclined to communicate or share information.
  • Uncomprehending: Not understanding or grasping.
  • Unconformities: A gap in the geologic record where rock layers are interrupted.
  • Uncontaminated: Not made impure by contaminants.
  • Uncontroversial: Not causing controversy or dispute.
  • Unconventional: Not bound by or conforming to convention or tradition.
  • Undemonstrative: Not given to showing emotion or affection.
  • Undeterminable: Not able to be determined or established.
  • Undiplomatically: In a manner that isn’t tactful or sensitive in dealing with others.
  • Undistinguishable: Not able to be distinguished or recognized as different.
  • Undistractedly: In a manner that isn’t diverted from a task.
  • Unearthliness: The quality of being strange or otherworldly.
  • Unequivocally: In a clear and unambiguous manner.
  • Unexceptionable: Not open to objection or criticism; beyond reproach.
  • Unexceptionably: In a manner that is beyond criticism.
  • Unfathomability: The quality of being impossible to comprehend or understand fully.
  • Unflappability: The quality of being calm in difficult situations.
  • Unflatteringly: In a manner that isn’t complimentary or favorable.
  • Unforeknowable: Impossible to be known beforehand.
  • Unforgettably: In a manner that can’t be forgotten.
  • Unforgivingly: In an unmerciful or relentless manner.
  • Unformalizable: Not able to be formalized.
  • Unfortuitously: In an unfortunate manner.
  • Unfriendliness: The quality of being unfriendly or hostile.
  • Unfulfillingly: In an unsatisfying or disappointing manner.
  • Ungrammatical: Not conforming to standard usage of grammar.
  • Ungratefulness: A lack of gratitude or appreciation.
  • Unhesitatingly: Without hesitation; promptly.
  • Unidimensional: Having only one dimension or aspect.
  • Unidirectional: Moving or operating in a single direction.
  • Unilluminated: Not illuminated; dark or not lit up.
  • Unimaginative: Lacking creativity or originality.
  • Unimpeachably: In a manner that can’t be doubted or questioned.
  • Unimpressively: In a manner that doesn’t impress.
  • Uninformatively: In a manner that doesn’t provide useful information.
  • Unintelligible: Impossible to understand.

15 Letter Words That Start With U

  • Ultraprogressive: Extremely forward-thinking or favoring progress.
  • Ultrasonographic: Pertaining to or using ultrasonography.
  • Ultrastructural: Relating to the ultrastructure, or fine detail, of cells as visible with an electron microscope.
  • Unapproachability: The quality of being difficult to approach or interact with.
  • Unattractiveness: The quality of lacking beauty or charm.
  • Unbelievabilities: Qualities of being hard to believe; incredibility.
  • Unchangeabilities: States of being unable to change; immutability.
  • Uncharacteristic: Not typical or representative of a person’s usual behavior or characteristics.
  • Uncompromisingly: In a manner that doesn’t allow for any concessions or adjustments.
  • Unconditionality: Absolute and without conditions.
  • Undifferentiated: Not having any distinctive features; lacking special characteristics.
  • Undiscriminating: Not showing careful choice or discernment; not discerning.
  • Undisturbedness: The state of being calm, peaceful, or not disrupted.
  • Unenthusiastically: In a manner showing a lack of enthusiasm.
  • Unidentifiability: The quality of being unable to be identified.
  • Uninterruptedness: The quality of being continuous without any disruptions.
  • Unintentionality: The state of being unintended or without intent.
  • Unmistakableness: The quality of being clear and impossible to mistake.
  • Unpredictability: The quality of being hard to predict or forecast.
  • Unquestionability: The quality of being impossible to doubt or dispute.
  • Unrecognizability: The quality of not being recognizable.
  • Unreconstructed: Not reconciled or converted to the prevailing viewpoint or ideology.
  • Unrepresentative: Not serving to represent or not typical of a group or class.
  • Unresponsiveness: The quality of not responding or reacting.

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