| sour | (adjective) having a sharp biting taste | - |
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| (adjective) showing a brooding ill humor | Synonyms: dark, dour, glowering, glum, moody, morose, saturnine, sullen |
| (adjective) inaccurate in pitch | Synonyms: false, off-key |
| (adjective) smelling of fermentation or staleness | Synonyms: rancid |
| (adjective) in an unpalatable state | Synonyms: off, turned |
| (adjective) one of the four basic taste sensations; like the taste of vinegar or lemons | - |
| spectacular | (adjective) having a quality that thrusts itself into attention | Synonyms: outstanding, prominent, salient, striking |
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| (adjective) characteristic of spectacles or drama | - |
| (adjective) sensational in appearance or thrilling in effect | Synonyms: dramatic, striking |
| specular | (adjective) capable of reflecting light like a mirror | Synonyms: mirrorlike |
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| spinnbar | (adjective) capable of being spun into fibres | Synonyms: spinnable |
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| star | (adjective) indicating the most important performer or role | Synonyms: leading, prima, starring, stellar |
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| stellar | (adjective) being or relating to or resembling or emanating from stars | Synonyms: astral |
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| (adjective) indicating the most important performer or role | Synonyms: leading, prima, star, starring |
| sublunar | (adjective) situated between the earth and the moon | Synonyms: cislunar, sublunary |
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| (adjective) of this earth | Synonyms: sublunary, terrestrial |
| subocular | (adjective) situated on or below the floor of the eye socket | Synonyms: suborbital |
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| super | (adjective) including more than a specified category | - |
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| (adjective) extremely large | - |
| (adjective) of the highest quality | Synonyms: A-one, ace, crack, first-rate, tiptop, top-notch, topnotch, tops |
| superior | (adjective) written or printed above and to one side of another character | Synonyms: superscript |
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| (adjective) of or characteristic of high rank or importance | - |
| (adjective) of high or superior quality or performance | - |
| (adjective) having an orbit farther from the sun than the Earth's orbit | - |
| (adjective) (sometimes followed by `to') not subject to or influenced by | - |
| (adjective) having a higher rank | Synonyms: higher-ranking, ranking |
| (adjective) (often followed by `to') above being affected or influenced by | - |
| superlunar | (adjective) situated beyond the moon or its orbit around the earth | Synonyms: superlunary, translunar, translunary |
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| (adjective) unworldly or ethereal | Synonyms: superlunary, translunar, translunary |
| supraocular | (adjective) located or occurring above the eye socket | Synonyms: supraorbital |
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| sustentacular | (adjective) serving to sustain or support | - |
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| swagger | (adjective) (British informal) very chic | Synonyms: groovy |
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| tabular | (adjective) of or pertaining to or arranged in table form | - |
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| (adjective) flat; like a table in form | - |
| tegular | (adjective) of or relating to or resembling a series of tiles | - |
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| tender | (adjective) easy to cut or chew | - |
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| (adjective) physically untoughened | Synonyms: untoughened |
| (adjective) given to sympathy or gentleness or sentimentality | - |
| (adjective) (of plants) not hardy; easily killed by adverse growing condition | - |
| (adjective) having or displaying warmth or affection | Synonyms: affectionate, fond, lovesome |
| (adjective) hurting | Synonyms: raw, sensitive, sore |
| (adjective) (used of boats) inclined to heel over easily under sail | Synonyms: crank, cranky, tippy |
| (adjective) young and immature | - |
| tenor | (adjective) of or close in range to the highest natural adult male voice | - |
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| (adjective) (of a musical instrument) intermediate between alto and baritone or bass | - |
| tentacular | (adjective) of or relating to or resembling tentacles | - |
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| testicular | (adjective) of or involving the testes | - |
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| thenar | (adjective) of or relating to the palm of the hand or to the area at the base of the thumb | Synonyms: thenal |
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| thermonuclear | (adjective) using nuclear weapons based on fusion as distinguished from fission | - |
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| titular | (adjective) of or associated with or bearing a title signifying nobility | - |
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| (adjective) of or pertaining to the title of a work of art | - |
| (adjective) of or bearing a title signifying status or function | - |
| (adjective) of or relating to a legal title to something | Synonyms: titulary |
| (adjective) existing in name only | Synonyms: nominal |
| together | (adjective) mentally and emotionally stable | - |
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| trabecular | (adjective) of or relating to trabeculae | Synonyms: trabeculate |
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| transgender | (adjective) involving a partial or full reversal of gender | Synonyms: transgendered |
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| translunar | (adjective) situated beyond the moon or its orbit around the earth | Synonyms: superlunar, superlunary, translunary |
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| (adjective) unworldly or ethereal | Synonyms: superlunar, superlunary, translunary |
| transpolar | (adjective) extending across or crossing either pole | - |
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| triangular | (adjective) having three angles; forming or shaped like a triangle | - |
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| (adjective) having three sides | Synonyms: three-sided, trilateral |
| tricolor | (adjective) having or involving three colors | Synonyms: trichromatic, trichrome |
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| trinuclear | (adjective) having three nuclei | Synonyms: trinucleate, trinucleated |
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| tubercular | (adjective) relating to tuberculosis or those suffering from it | - |
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| (adjective) pertaining to or of the nature of a normal tuberosity or tubercle | - |
| (adjective) characterized by the presence of tuberculosis lesions or tubercles | - |
| (adjective) constituting or afflicted with or caused by tuberculosis or the tubercle bacillus | Synonyms: tuberculous |
| tubular | (adjective) constituting a tube; having hollow tubes (as for the passage of fluids) | Synonyms: cannular, tube-shaped, tubelike, vasiform |
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| tutelar | (adjective) providing protective supervision; watching over or safeguarding | Synonyms: custodial, tutelary |
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| ulnar | (adjective) relating to or near the ulna | - |
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| ulterior | (adjective) lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed) | Synonyms: subterranean, subterraneous |
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| (adjective) beyond or outside an area of immediate interest; remote | - |
| (adjective) coming at a subsequent time or stage | Synonyms: later, posterior |
| umbellar | (adjective) bearing or consisting of or resembling umbels | Synonyms: umbellate |
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| umber | (adjective) of the color of any of various natural brown earth pigments | - |
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| unbitter | (adjective) having or showing no resentment or desire for revenge | - |
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| unclear | (adjective) not clear to the mind | - |
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| (adjective) poorly stated or described | Synonyms: ill-defined |
| (adjective) not easily deciphered | Synonyms: indecipherable, undecipherable, unreadable |
| under | (adjective) located below or beneath something else | Synonyms: nether |
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| (adjective) lower in rank, power, or authority | - |
| undercover | (adjective) conducted with or marked by hidden aims or methods | Synonyms: clandestine, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, underground |
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| underwater | (adjective) growing or remaining under water | Synonyms: subaquatic, subaqueous, submerged, submersed |
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| (adjective) beneath the surface of the water | Synonyms: submerged, submersed |
| uneager | (adjective) lacking interest or spirit or animation | - |
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| unfair | (adjective) not fair; marked by injustice or partiality or deception | Synonyms: unjust |
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| unfamiliar | (adjective) not known or well known | - |
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| unicellular | (adjective) having or consisting of a single cell | - |
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| unifilar | (adjective) having or using only one filament | - |
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| uniovular | (adjective) having a single ovule | Synonyms: uniovulate |
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| unipolar | (adjective) having a single pole | - |
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| unpopular | (adjective) regarded with disfavor or lacking general approval | - |
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| unspectacular | (adjective) not spectacular | - |
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| upper | (adjective) the topmost one of two; upper | - |
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| (adjective) higher in place or position | - |
| (adjective) superior in rank or accomplishment | - |
| upstair | (adjective) on or of upper floors of a building | Synonyms: upstairs |
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| utter | (adjective) complete and absolute | Synonyms: blank |
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| (adjective) without qualification; used informally as (often pejorative) intensifiers | Synonyms: arrant, complete, consummate, double-dyed, everlasting, gross, perfect, pure, sodding, staring, stark, thorough, thoroughgoing, unadulterated |
| uvular | (adjective) of or relating to or associated with the uvula | - |
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| valvular | (adjective) relating to or operating by means of valves | - |
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| variolar | (adjective) relating to small pox | Synonyms: variolic, variolous |
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| vascular | (adjective) of or relating to or having vessels that conduct and circulate fluids | - |
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| vasomotor | (adjective) relating to the nerves and muscles that cause the blood vessels to constrict or dilate | - |
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| vehicular | (adjective) of or relating to or intended for (motor) vehicles | - |
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| velar | (adjective) of or relating to the velum | - |
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| (adjective) produced with the back of the tongue touching or near the soft palate (as `k' in `cat' and `g' in `gun' and `ng' in `sing') | - |
| ventricular | (adjective) of or relating to a ventricle (of the heart or brain) | - |
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| verisimilar | (adjective) appearing to be true or real | - |
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| vermicular | (adjective) decorated with wormlike tracery or markings | Synonyms: vermiculate, vermiculated |
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| vernacular | (adjective) being or characteristic of or appropriate to everyday language | Synonyms: common, vulgar |
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| vesicular | (adjective) of or relating to or involving vesicles | - |
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| vestibular | (adjective) relating to the sense of equilibrium | - |
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| volar | (adjective) relating to the palm of the hand or the sole of the foot | Synonyms: palmar |
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| volunteer | (adjective) without payment | Synonyms: unpaid |
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| vulgar | (adjective) conspicuously and tastelessly indecent | Synonyms: crude, earthy, gross |
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| (adjective) of or associated with the great masses of people | Synonyms: common, plebeian, unwashed |
| (adjective) lacking refinement or cultivation or taste | Synonyms: coarse, common, rough-cut, uncouth |
| (adjective) being or characteristic of or appropriate to everyday language | Synonyms: common, vernacular |
| vulpecular | (adjective) resembling or characteristic of a fox | Synonyms: vulpine |
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| vulvar | (adjective) of or relating to the vulva | Synonyms: vulval |
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| weather | (adjective) towards the side exposed to wind | Synonyms: upwind |
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| whatever | (adjective) one or some or every or all without specification; entity, elective existential pronoun; quantifier, elective existential | Synonyms: any, whatsoever |
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| whatsoever | (adjective) one or some or every or all without specification; entity, elective existential pronoun; quantifier, elective existential | Synonyms: any, whatever |
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| yonder | (adjective) distant but within sight (`yon' is dialectal) | Synonyms: yon |
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| younger | (adjective) used of the younger of two persons of the same name especially used to distinguish a son from his father | Synonyms: jr., Junior |
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