| toeless | (adjective) lacking a toe or toes | - |
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| tomentous | (adjective) densely covered with short matted woolly hairs | Synonyms: tomentose |
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| toneless | (adjective) lacking in tone or expression | - |
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| tongueless | (adjective) lacking a tongue | - |
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| (adjective) expressed without speech | Synonyms: mute, silent, unspoken, wordless |
| toothless | (adjective) lacking teeth | - |
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| (adjective) lacking necessary force for effectiveness | - |
| topless | (adjective) having no top | - |
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| (adjective) having the breasts uncovered or featuring such nudity | Synonyms: bare-breasted, braless |
| tops | (adjective) of the highest quality | Synonyms: A-one, ace, crack, first-rate, super, tiptop, top-notch, topnotch |
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| tortious | (adjective) of or pertaining to the nature of a tort | - |
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| tortuous | (adjective) highly complex or intricate and occasionally devious | Synonyms: Byzantine, convoluted, involved, knotty, labyrinthine, tangled |
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| (adjective) marked by repeated turns and bends | Synonyms: twisting, twisty, voluminous, winding |
| (adjective) not straightforward | - |
| torturous | (adjective) extremely painful | Synonyms: agonising, agonizing, excruciating, harrowing, torturesome, torturing |
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| trackless | (adjective) having no tracks | - |
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| (adjective) lacking pathways | Synonyms: pathless, roadless, untracked, untrod, untrodden |
| traitorous | (adjective) having the character of, or characteristic of, a traitor | Synonyms: faithless, treasonable, treasonous, unfaithful |
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| tralatitious | (adjective) having been passed along from generation to generation | Synonyms: handed-down |
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| transcutaneous | (adjective) through the unbroken skin; refers to medications applied directly to the skin (creams or ointments) or in time-release forms (skin patches) | Synonyms: percutaneous, transdermal, transdermic |
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| treacherous | (adjective) dangerously unstable and unpredictable | Synonyms: unreliable |
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| (adjective) tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans | Synonyms: perfidious, punic |
| treasonous | (adjective) having the character of, or characteristic of, a traitor | Synonyms: faithless, traitorous, treasonable, unfaithful |
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| treeless | (adjective) not wooded | Synonyms: unwooded |
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| tremendous | (adjective) extraordinarily good or great; used especially as intensifiers | Synonyms: fantastic, grand, howling, marvellous, marvelous, phenomenal, rattling, terrific, wonderful, wondrous |
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| (adjective) extraordinarily large in size or extent or amount or power or degree | Synonyms: enormous |
| (adjective) extreme in degree or extent or amount or impact | Synonyms: awful, frightful, terrible |
| tremulous | (adjective) (of the voice) quivering as from weakness or fear | Synonyms: quavering |
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| troublous | (adjective) full of trouble | - |
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| tubeless | (adjective) of a tire; not needing an inner tube | - |
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| tuberculous | (adjective) constituting or afflicted with or caused by tuberculosis or the tubercle bacillus | Synonyms: tubercular |
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| tuberous | (adjective) of or relating to or resembling a tuber | - |
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| tumultuous | (adjective) characterized by unrest or disorder or insubordination | Synonyms: disruptive, riotous, troubled, turbulent |
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| tuneless | (adjective) not having a musical sound or pleasing tune | Synonyms: unmelodious, untuneful |
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| tyrannous | (adjective) marked by unjust severity or arbitrary behavior | Synonyms: oppressive, tyrannical |
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| ubiquitous | (adjective) being present everywhere at once | Synonyms: omnipresent |
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| ulcerous | (adjective) having an ulcer or canker | Synonyms: cankerous, ulcerated |
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| umbelliferous | (adjective) relating to or belonging to plants of the family Umbelliferae | - |
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| umbrageous | (adjective) angered at something unjust or wrong | Synonyms: incensed, indignant, outraged |
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| (adjective) filled with shade | Synonyms: shadowed, shadowy, shady |
| unadventurous | (adjective) lacking in boldness | - |
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| unambiguous | (adjective) having or exhibiting a single clearly defined meaning | - |
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| (adjective) admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion | Synonyms: unequivocal, univocal |
| unambitious | (adjective) having little desire for success or achievement | Synonyms: ambitionless |
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| unanimous | (adjective) in complete agreement | Synonyms: consentaneous, consentient |
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| (adjective) acting together as a single undiversified whole | Synonyms: solid, whole |
| unceremonious | (adjective) without due formalities | - |
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| (adjective) without ceremony or formality | Synonyms: unceremonial |
| unchivalrous | (adjective) offensively discourteous | Synonyms: caddish, ungallant |
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| unconscientious | (adjective) not conscientious | - |
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| unconscious | (adjective) not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead | - |
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| (adjective) without conscious volition | - |
| (adjective) (followed by `of') not knowing or perceiving | - |
| unctuous | (adjective) unpleasantly and excessively suave or ingratiating in manner or speech | Synonyms: buttery, fulsome, oily, oleaginous, smarmy, soapy |
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| underclass | (adjective) belonging to the lowest and least privileged social stratum | - |
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| undesirous | (adjective) having or feeling no desire | Synonyms: undesiring |
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| unfastidious | (adjective) marked by an absence of due or proper care or attention to detail; not concerned with cleanliness | - |
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| (adjective) not exacting in nutritional requirements | - |
| ungenerous | (adjective) lacking in magnanimity | Synonyms: meanspirited |
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| (adjective) unwilling to spend (money, time, resources, etc.) | Synonyms: stingy |
| unglamorous | (adjective) not challenging; dull and lacking excitement | Synonyms: commonplace, humdrum, prosaic, unglamourous |
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| unglamourous | (adjective) not challenging; dull and lacking excitement | Synonyms: commonplace, humdrum, prosaic, unglamorous |
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| ungracious | (adjective) lacking charm and good taste | - |
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| (adjective) lacking social graces | Synonyms: discourteous |
| ungregarious | (adjective) (of animals) not gregarious | - |
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| (adjective) (of plants) growing together in groups that are not close together | - |
| (adjective) not disposed to seek company | - |
| unharmonious | (adjective) not in harmony | Synonyms: inharmonious |
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| unhazardous | (adjective) thought to be devoid of risk | Synonyms: risk-free, riskless |
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| unhumorous | (adjective) lacking humor | Synonyms: humorless, humourless |
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| uniparous | (adjective) producing only one offspring at a time | - |
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| unmalicious | (adjective) not malicious or spiteful | - |
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| unmelodious | (adjective) lacking melody | Synonyms: unmelodic, unmusical |
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| (adjective) not having a musical sound or pleasing tune | Synonyms: tuneless, untuneful |
| unmeritorious | (adjective) without merit | - |
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| unobvious | (adjective) not immediately apparent | - |
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| unostentatious | (adjective) not ostentatious | Synonyms: unpretending, unpretentious |
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| (adjective) exhibiting restrained good taste | Synonyms: understated, unpretentious |
| unpompous | (adjective) not pompous | - |
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| unpretentious | (adjective) lacking pretension or affectation | - |
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| (adjective) not ostentatious | Synonyms: unostentatious, unpretending |
| (adjective) exhibiting restrained good taste | Synonyms: understated, unostentatious |
| unpropitious | (adjective) not propitious | - |
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| unrighteous | (adjective) not righteous | - |
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| unscrupulous | (adjective) without scruples or principles | - |
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| unselfconscious | (adjective) not self-conscious | - |
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| unstudious | (adjective) not studious | - |
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| unsuspicious | (adjective) not suspicious | Synonyms: unsuspecting |
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| unsynchronous | (adjective) not occurring together | Synonyms: nonsynchronous, unsynchronised, unsynchronized |
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| uproarious | (adjective) marked by or causing boisterous merriment or convulsive laughter | Synonyms: hilarious, screaming |
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| (adjective) uncontrollably noisy | Synonyms: rackety, rip-roaring |
| upstairs | (adjective) on or of upper floors of a building | Synonyms: upstair |
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| useless | (adjective) having no beneficial use or incapable of functioning usefully | - |
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| usurious | (adjective) greatly exceeding bounds of reason or moderation | Synonyms: exorbitant, extortionate, outrageous, steep, unconscionable |
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| uveous | (adjective) of or relating to the uvea of the eye | Synonyms: uveal |
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| uxorious | (adjective) foolishly fond of or submissive to your wife | - |
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| vacuous | (adjective) devoid of matter | - |
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| (adjective) devoid of intelligence or thought | Synonyms: mindless, vacant |
| (adjective) devoid of significance or force | Synonyms: empty, hollow |
| vainglorious | (adjective) feeling self-importance | Synonyms: big, swelled |
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| valorous | (adjective) having or showing valor | Synonyms: valiant |
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| valueless | (adjective) of no value | - |
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| vaporous | (adjective) filled with vapor | Synonyms: miasmal, miasmic, vapourous |
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| (adjective) resembling or characteristic of vapor | Synonyms: vaporific, vaporish, vapourific, vapourish, vapourous |
| (adjective) so thin as to transmit light | Synonyms: cobwebby, diaphanous, filmy, gauze-like, gauzy, gossamer, see-through, sheer, transparent, vapourous |
| vapourous | (adjective) filled with vapor | Synonyms: miasmal, miasmic, vaporous |
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| (adjective) resembling or characteristic of vapor | Synonyms: vaporific, vaporish, vaporous, vapourific, vapourish |
| (adjective) so thin as to transmit light | Synonyms: cobwebby, diaphanous, filmy, gauze-like, gauzy, gossamer, see-through, sheer, transparent, vaporous |
| variolous | (adjective) relating to small pox | Synonyms: variolar, variolic |
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| various | (adjective) distinctly dissimilar or unlike | Synonyms: diverse |
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| (adjective) considered individually | Synonyms: respective, several |
| (adjective) of many different kinds purposefully arranged but lacking any uniformity | Synonyms: assorted |
| (adjective) having great diversity or variety | Synonyms: versatile |
| venomous | (adjective) marked by deep ill will; deliberately harmful | Synonyms: poisonous, vicious |
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| (adjective) extremely poisonous or injurious; producing venom | Synonyms: deadly, virulent |
| venous | (adjective) of or contained in or performing the function of the veins | - |
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| ventricous | (adjective) having a swelling on one side | Synonyms: ventricose |
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| venturous | (adjective) disposed to venture or take risks | Synonyms: audacious, daring, venturesome |
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| veracious | (adjective) precisely accurate | Synonyms: right |
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| (adjective) habitually speaking the truth | - |
| verminous | (adjective) of the nature of vermin; very offensive or repulsive | - |
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| vertiginous | (adjective) having or causing a whirling sensation; liable to falling | Synonyms: dizzy, giddy, woozy |
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| vexatious | (adjective) causing irritation or annoyance | Synonyms: annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, teasing, vexing |
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| vicarious | (adjective) occurring in an abnormal part of the body instead of the usual site involved in that function | - |
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| (adjective) suffered or done by one person as a substitute for another | - |
| (adjective) experienced at secondhand | - |
| vicious | (adjective) (of persons or their actions) able or disposed to inflict pain or suffering | Synonyms: barbarous, brutal, cruel, fell, roughshod, savage |
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| (adjective) marked by deep ill will; deliberately harmful | Synonyms: poisonous, venomous |
| (adjective) having the nature of vice | Synonyms: evil |
| (adjective) bringing or deserving severe rebuke or censure | Synonyms: condemnable, criminal, deplorable, reprehensible |
| victorious | (adjective) having won | Synonyms: winning |
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| (adjective) experiencing triumph | Synonyms: triumphant |
| viewless | (adjective) not having or expressing opinions or views | - |
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| vigorous | (adjective) characterized by forceful and energetic action or activity | - |
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| (adjective) strong and active physically or mentally | - |
| villainous | (adjective) extremely wicked | Synonyms: nefarious |
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| vinaceous | (adjective) of or relating to wine | Synonyms: vinous |
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| (adjective) of the color of wine | - |
| vinous | (adjective) of or relating to wine | Synonyms: vinaceous |
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| virtuous | (adjective) morally excellent | - |
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| (adjective) in a state of sexual virginity | Synonyms: pure, vestal, virgin, virginal |
| viscous | (adjective) having the sticky properties of an adhesive | Synonyms: gluey, glutinous, gummy, mucilaginous, pasty, sticky, viscid |
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| (adjective) having a relatively high resistance to flow | Synonyms: syrupy |
| vitiliginous | (adjective) of or relating to or having vitiligo | - |
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| vitreous | (adjective) relating to or resembling or derived from or containing glass | - |
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| (adjective) of or relating to or constituting the vitreous humor of the eye | - |
| (adjective) (of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it | Synonyms: glassy, vitrified |
| vivacious | (adjective) vigorous and animated | Synonyms: vibrant |
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