| adventive | (adjective) not native and not fully established; locally or temporarily naturalized | - |
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| adventuresome | (adjective) willing to undertake or seeking out new and daring enterprises | Synonyms: adventurous |
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| adventuristic | (adjective) of or pertaining to adventurism | - |
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| adventurous | (adjective) willing to undertake or seeking out new and daring enterprises | Synonyms: adventuresome |
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| adverbial | (adjective) of or relating to or functioning as an adverb | - |
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| adversative | (adjective) expressing antithesis or opposition | Synonyms: oppositive |
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| adverse | (adjective) in an opposing direction | Synonyms: contrary |
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| (adjective) contrary to your interests or welfare | Synonyms: inauspicious, untoward |
| advertent | (adjective) giving attention | Synonyms: heedful |
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| advertised | (adjective) called to public attention | - |
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| advisable | (adjective) worthy of being recommended or suggested; prudent or wise | - |
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| advised | (adjective) having the benefit of careful prior consideration or counsel | Synonyms: well-advised |
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| (adjective) having received information | - |
| advisory | (adjective) giving advice | Synonyms: consultative, consultatory, consultive |
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| adynamic | (adjective) characterized by an absence of force or forcefulness | Synonyms: undynamic |
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| (adjective) lacking energy or vitality | Synonyms: asthenic, debilitated, enervated |
| agonadal | (adjective) lacking gonads | - |
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| ahead | (adjective) having the leading position or higher score in a contest | Synonyms: in the lead, leading |
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| airheaded | (adjective) lacking seriousness; given to frivolity | Synonyms: dizzy, empty-headed, featherbrained, giddy, light-headed, lightheaded, silly |
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| ambassadorial | (adjective) of or relating to or characteristic of ambassadors | - |
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| anadromous | (adjective) migrating from the sea to fresh water to spawn | - |
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| anterograde | (adjective) of amnesia; affecting time immediately following trauma | - |
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| antiadrenergic | (adjective) relating to blocking or reducing adrenergic effects in the body | - |
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| arcadian | (adjective) (used with regard to idealized country life) idyllically rustic | Synonyms: bucolic, pastoral |
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| asclepiadaceous | (adjective) of or relating to plants of the milkweed family | - |
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| autoloading | (adjective) (of firearms) capable of automatic loading and firing continuously | Synonyms: self-loading, semiautomatic |
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| autoradiographic | (adjective) of or relating to or produced by autoradiography | - |
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| avocado | (adjective) of the dull yellowish green of the meat of an avocado | - |
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| bad | (adjective) having undesirable or negative qualities | - |
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| (adjective) feeling or expressing regret or sorrow or a sense of loss over something done or undone | Synonyms: regretful, sorry |
| (adjective) reproduced fraudulently | Synonyms: forged |
| (adjective) characterized by wickedness or immorality | - |
| (adjective) capable of harming | - |
| (adjective) below average in quality or performance | - |
| (adjective) serious or severe | Synonyms: big |
| (adjective) not capable of being collected | Synonyms: uncollectible |
| (adjective) not working properly | Synonyms: defective |
| (adjective) nonstandard | - |
| (adjective) (of foodstuffs) not in an edible or usable condition | Synonyms: spoiled, spoilt |
| (adjective) feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') | Synonyms: tough |
| (adjective) physically unsound or diseased | Synonyms: unfit, unsound |
| (adjective) not financially safe or secure | Synonyms: high-risk, risky, speculative |
| badass | (adjective) being impressive due to extreme attitude or style | - |
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| bareheaded | (adjective) having the head uncovered | Synonyms: bared |
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| barricaded | (adjective) preventing entry or exit or a course of action | Synonyms: barred, blockaded |
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| beaded | (adjective) covered with beads of liquid | - |
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| beadlike | (adjective) small and round and shiny like a shiny bead or button | Synonyms: beady, buttonlike, buttony |
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| beady | (adjective) covered with beads or jewels or sequins | Synonyms: gemmed, jeweled, jewelled, sequined, spangled, spangly |
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| (adjective) small and round and shiny like a shiny bead or button | Synonyms: beadlike, buttonlike, buttony |
| beheaded | (adjective) having had the head cut off | Synonyms: decapitated |
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| bigheaded | (adjective) (used colloquially) overly conceited or arrogant | Synonyms: persnickety, snooty, snot-nosed, snotty, stuck-up, too big for one's breeches, uppish |
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| biodegradable | (adjective) capable of being decomposed by e.g. bacteria | - |
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| biquadratic | (adjective) involving the fourth and no higher power of a quantity or degree | - |
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| biradial | (adjective) showing both bilateral and radial symmetry | - |
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| bladderlike | (adjective) resembling a bladder | Synonyms: bladdery |
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| bladdery | (adjective) resembling a bladder | Synonyms: bladderlike |
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| bladed | (adjective) bearing or characterized by a blade or sword; often used in combination | - |
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| (adjective) having a blade or blades; often used in combination | - |
| (adjective) composed of thin flat plates resembling a knife blade | - |
| bladelike | (adjective) shaped like a sword blade | Synonyms: ensiform, sword-shaped, swordlike |
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| blockaded | (adjective) preventing entry or exit or a course of action | Synonyms: barred, barricaded |
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| blockading | (adjective) blocking entrance to and exit from seaports and harbors | - |
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| blockheaded | (adjective) (used informally) stupid | Synonyms: boneheaded, duncical, duncish, fatheaded, loggerheaded, thick-skulled, thick, thickheaded, wooden-headed |
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| boneheaded | (adjective) (used informally) stupid | Synonyms: blockheaded, duncical, duncish, fatheaded, loggerheaded, thick-skulled, thick, thickheaded, wooden-headed |
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| broad | (adjective) having great (or a certain) extent from one side to the other | Synonyms: wide |
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| (adjective) showing or characterized by broad-mindedness | Synonyms: large-minded, liberal, tolerant |
| (adjective) lacking subtlety; obvious | Synonyms: unsubtle |
| (adjective) broad in scope or content | Synonyms: across-the-board, all-embracing, all-encompassing, all-inclusive, blanket, encompassing, extensive, panoptic, wide |
| (adjective) not detailed or specific | Synonyms: unspecific |
| (adjective) being at a peak or culminating point | Synonyms: full |
| (adjective) very large in expanse or scope | Synonyms: spacious, wide |
| (adjective) (of speech) heavily and noticeably regional | - |
| broadband | (adjective) responding to or operating at a wide band of frequencies | Synonyms: wideband |
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| (adjective) of or relating to or being a communications network in which the bandwidth can be divided and shared by multiple simultaneous signals (as for voice or data or video) | - |
| broadleaf | (adjective) having relatively broad rather than needlelike or scalelike leaves | Synonyms: broad-leafed, broad-leaved |
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| broadloom | (adjective) (of rugs or carpets) woven full width | - |
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| broadnosed | (adjective) of or related to New World monkeys having nostrils far apart or to people with broad noses | Synonyms: platyrhine, platyrhinian, platyrrhine, platyrrhinian, platyrrhinic |
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| broadside | (adjective) toward a full side | - |
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| brocaded | (adjective) embellished with a raised pattern created by pressure or embroidery | Synonyms: embossed, raised |
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| bullheaded | (adjective) obstinate and stupid | Synonyms: bullet-headed, pigheaded |
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| cadastral | (adjective) of or relating to the records of a cadastre | - |
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| cadaveric | (adjective) of or relating to a cadaver or corpse | Synonyms: cadaverous |
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| cadaverous | (adjective) of or relating to a cadaver or corpse | Synonyms: cadaveric |
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| (adjective) very thin especially from disease or hunger or cold | Synonyms: emaciated, gaunt, haggard, pinched, skeletal, wasted |
| caddish | (adjective) offensively discourteous | Synonyms: unchivalrous, ungallant |
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| cadenced | (adjective) marked by a rhythmical cadence | Synonyms: cadent |
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| cadent | (adjective) marked by a rhythmical cadence | Synonyms: cadenced |
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| caducean | (adjective) of or relating to a caduceus | - |
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| caducous | (adjective) shed at an early stage of development | Synonyms: shed |
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| catadromous | (adjective) migrating from fresh water to the sea to spawn | - |
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| centigrade | (adjective) of or relating to a temperature scale on which the freezing point of water is 0 degrees and the boiling point of water is 100 degrees | - |
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| circadian | (adjective) of or relating to biological processes occurring at 24-hour intervals | - |
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| clad | (adjective) wearing or provided with clothing; sometimes used in combination | Synonyms: clothed |
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| (adjective) having an outer covering especially of thin metal | - |
| clearheaded | (adjective) not mentally confused; able to think clearly and act intelligently | Synonyms: clear-thinking |
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| colonnaded | (adjective) having a series of columns arranged at regular intervals | - |
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| comradely | (adjective) heartily friendly and congenial | Synonyms: hail-fellow-well-met, hail-fellow |
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| contradictory | (adjective) of words or propositions so related that both cannot be true and both cannot be false | - |
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| (adjective) unable for both to exist or be true at the same time | Synonyms: mutually exclusive |
| (adjective) in disagreement | Synonyms: at odds, conflicting, self-contradictory |
| (adjective) that confounds or contradicts or confuses | Synonyms: confounding |
| coolheaded | (adjective) marked by calm self-control (especially in trying circumstances); unemotional | Synonyms: cool, nerveless |
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| dead | (adjective) no longer having or seeming to have or expecting to have life | - |
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| (adjective) not showing characteristics of life especially the capacity to sustain life; no longer exerting force or having energy or heat | - |
| (adjective) the complete stoppage of an action | - |
| (adjective) not surviving in active use | - |
| (adjective) physically inactive | - |
| (adjective) devoid of activity | - |
| (adjective) lacking resilience or bounce | - |
| (adjective) out of use or operation because of a fault or breakdown | - |
| (adjective) devoid of physical sensation; numb | Synonyms: deadened |
| (adjective) (followed by `to') not showing human feeling or sensitivity; unresponsive | Synonyms: numb |
| (adjective) no longer having force or relevance | - |
| (adjective) unerringly accurate | - |
| (adjective) not circulating or flowing | Synonyms: stagnant |
| (adjective) very tired | Synonyms: all in, beat, bushed |
| (adjective) drained of electric charge; discharged | Synonyms: drained |
| (adjective) not yielding a return | Synonyms: idle |
| (adjective) lacking acoustic resonance | - |
| deadened | (adjective) made or become less intense | - |
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| (adjective) devoid of physical sensation; numb | Synonyms: dead |
| deadening | (adjective) so lacking in interest as to cause mental weariness | Synonyms: boring, dull, ho-hum, irksome, slow, tedious, tiresome, wearisome |
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| deadlocked | (adjective) at a complete standstill because of opposition of two unrelenting forces or factions | Synonyms: stalemated |
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| deadly | (adjective) exceedingly harmful | Synonyms: baneful, pernicious, pestilent |
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| (adjective) extremely poisonous or injurious; producing venom | Synonyms: venomous, virulent |
| (adjective) involving loss of divine grace or spiritual death | Synonyms: mortal |
| (adjective) (of a disease) having a rapid course and violent effect | - |
| (adjective) causing or capable of causing death | Synonyms: deathly, mortal |
| (adjective) of an instrument of certain death | Synonyms: lethal |
| deadpan | (adjective) deliberately impassive in manner | Synonyms: expressionless, impassive, poker-faced, unexpressive |
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| decadent | (adjective) marked by excessive self-indulgence and moral decay | Synonyms: fin-de-siecle |
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| (adjective) luxuriously self-indulgent | - |
| degraded | (adjective) unrestrained by convention or morality | Synonyms: debauched, degenerate, dissipated, dissolute, fast, libertine, profligate, riotous |
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| (adjective) lowered in value | Synonyms: debased, devalued |
| degrading | (adjective) used of conduct; characterized by dishonor | Synonyms: debasing |
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| (adjective) harmful to the mind or morals | Synonyms: corrupting |
| diadromous | (adjective) (used of fish) migratory between fresh and salt waters | - |
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| digitigrade | (adjective) (of mammals) walking on the toes with the posterior part of the foot raised (as cats, dogs, and horses do) | - |
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| disadvantaged | (adjective) marked by deprivation especially of the necessities of life or healthful environmental influences | Synonyms: deprived |
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| disadvantageous | (adjective) involving or creating circumstances detrimental to success or effectiveness | Synonyms: unfavorable, unfavourable |
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| dread | (adjective) causing fear or dread or terror | Synonyms: awful, dire, direful, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
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| dreaded | (adjective) causing fear or dread or terror | Synonyms: awful, dire, direful, dread, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
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| dreadful | (adjective) causing fear or dread or terror | Synonyms: awful, dire, direful, dread, dreaded, fearful, fearsome, frightening, horrendous, horrific, terrible |
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| (adjective) exceptionally bad or displeasing | Synonyms: abominable, atrocious, awful, painful, terrible, unspeakable |
| (adjective) extremely disagreeable and unpleasant | - |
| drumhead | (adjective) performed speedily and without formality | Synonyms: summary |
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| dyadic | (adjective) of or relating to a dyad or based on two | - |
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| eradicable | (adjective) able to be eradicated or rooted out | - |
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| extradural | (adjective) on or outside the dura mater | Synonyms: epidural |
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| faddish | (adjective) intensely fashionable for a short time | Synonyms: faddy |
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| faddy | (adjective) intensely fashionable for a short time | Synonyms: faddish |
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| faded | (adjective) having lost freshness or brilliance of color | Synonyms: bleached, washed-out, washy |
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| (adjective) reduced in strength | Synonyms: attenuate, attenuated, weakened |
| fatheaded | (adjective) (used informally) stupid | Synonyms: blockheaded, boneheaded, duncical, duncish, loggerheaded, thick-skulled, thick, thickheaded, wooden-headed |
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| foreshadowing | (adjective) indistinctly prophetic | Synonyms: adumbrative, prefigurative |
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| glad | (adjective) showing or causing joy and pleasure; especially made happy | - |
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| (adjective) cheerful and bright | Synonyms: beaming |
| (adjective) feeling happy appreciation | - |
| (adjective) eagerly disposed to act or to be of service | Synonyms: happy |
| gladdened | (adjective) made joyful | Synonyms: exhilarated |
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| gladiatorial | (adjective) of or relating to or resembling gladiators or their combat | - |
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| gladsome | (adjective) experiencing or expressing gladness or joy | - |
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| goaded | (adjective) compelled forcibly by an outside agency | Synonyms: driven |
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