| acquirable | (adjective) capable of being acquired | - |
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| acquired | (adjective) gotten through environmental forces | - |
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| admirable | (adjective) inspiring admiration or approval | - |
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| (adjective) deserving of esteem and respect | Synonyms: estimable, good, honorable, respectable |
| admired | (adjective) regarded with admiration | - |
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| affirmable | (adjective) capable of being affirmed or asserted | Synonyms: assertable |
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| affirmative | (adjective) affirming or giving assent | Synonyms: affirmatory |
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| (adjective) expressing or manifesting praise or approval | Synonyms: approbative, approbatory, approving, plausive |
| (adjective) expecting the best | Synonyms: optimistic |
| affirmatory | (adjective) affirming or giving assent | Synonyms: affirmative |
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| afire | (adjective) lighted up by or as by fire or flame | Synonyms: ablaze, aflame, aflare, alight, on fire |
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| airborne | (adjective) moved or conveyed by or through air | - |
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| aired | (adjective) open to or abounding in fresh air | Synonyms: airy |
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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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| airless | (adjective) lacking fresh air | Synonyms: close, stuffy, unaired |
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| airlike | (adjective) resembling air or having the form of air | Synonyms: aeriform |
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| airsick | (adjective) experiencing motion sickness | Synonyms: air sick, carsick, seasick |
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| airtight | (adjective) having no weak points | Synonyms: air-tight |
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| (adjective) not allowing air or gas to pass in or out | Synonyms: air-tight, gas-tight |
| airworthy | (adjective) (of aircraft) fit to fly | - |
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| airy | (adjective) characterized by lightness and insubstantiality; as impalpable or intangible as air | Synonyms: aerial, aeriform, aery, ethereal |
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| (adjective) having little or no perceptible weight; so light as to resemble air | - |
| (adjective) not practical or realizable; speculative | Synonyms: impractical, Laputan, visionary, windy |
| (adjective) open to or abounding in fresh air | Synonyms: aired |
| antiaircraft | (adjective) designed for defense from a surface position against air attack | - |
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| antiviral | (adjective) inhibiting or stopping the growth and reproduction of viruses | - |
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| aspirant | (adjective) desiring or striving for recognition or advancement | Synonyms: aspiring, wishful |
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| aspiring | (adjective) desiring or striving for recognition or advancement | Synonyms: aspirant, wishful |
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| astir | (adjective) on the move | Synonyms: about |
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| (adjective) out of bed | Synonyms: up |
| athirst | (adjective) (usually followed by `for') extremely desirous | Synonyms: hungry, thirsty |
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| attired | (adjective) dressed or clothed especially in fine attire; often used in combination | Synonyms: appareled, dressed, garbed, garmented, habilimented, robed |
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| avirulent | (adjective) not virulent; unable to produce disease | - |
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| backstair | (adjective) secret and sly or sordid | Synonyms: backstairs, furtive |
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| backstairs | (adjective) secret and sly or sordid | Synonyms: backstair, furtive |
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| bidirectional | (adjective) reactive or functioning or allowing movement in two usually opposite directions | - |
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| biracial | (adjective) consisting of or combining two races | - |
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| biradial | (adjective) showing both bilateral and radial symmetry | - |
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| biramous | (adjective) resembling a fork; divided or separated into two branches | Synonyms: bifurcate, branched, forficate, fork-like, forked, pronged, prongy |
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| birch | (adjective) consisting of or made of wood of the birch tree | Synonyms: birchen, birken |
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| birchen | (adjective) consisting of or made of wood of the birch tree | Synonyms: birch, birken |
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| birefringent | (adjective) relating to or characterized by double refraction | - |
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| birken | (adjective) consisting of or made of wood of the birch tree | Synonyms: birch, birchen |
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| bloodthirsty | (adjective) marked by eagerness to resort to violence and bloodshed | Synonyms: bloody-minded, sanguinary |
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| buirdly | (adjective) muscular and heavily built | Synonyms: beefy, burly, husky, strapping |
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| cairned | (adjective) marked by cairns | - |
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| cardiorespiratory | (adjective) of or pertaining to or affecting both the heart and the lungs and their functions | Synonyms: cardiopulmonary |
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| chiromantic | (adjective) of or relating to palmistry | - |
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| chirpy | (adjective) (birds or insects) characterized by or tending to chirp | - |
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| (adjective) characterized by liveliness and lightheartedness | Synonyms: buoyant, perky |
| circadian | (adjective) of or relating to biological processes occurring at 24-hour intervals | - |
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| circinate | (adjective) shaped like a ring | Synonyms: annular, annulate, annulated, doughnut-shaped, ring-shaped, ringed |
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| circuitous | (adjective) deviating from a straight course | Synonyms: devious, roundabout |
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| (adjective) marked by obliqueness or indirection in speech or conduct | Synonyms: roundabout |
| circular | (adjective) having the shape or form of a circle | Synonyms: round |
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| (adjective) describing a circle; moving in a circle | Synonyms: orbitual, rotary |
| circulating | (adjective) passing from one to another | - |
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| circulative | (adjective) of or relating to circulation | Synonyms: circulatory |
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| circulatory | (adjective) relating to circulatory system or to circulation of the blood | - |
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| (adjective) of or relating to circulation | Synonyms: circulative |
| circumboreal | (adjective) comprising or throughout far northern regions | Synonyms: boreal |
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| circumferent | (adjective) closely encircling | Synonyms: encompassing, surrounding |
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| circumferential | (adjective) lying around or just outside the edges or outskirts | - |
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| circumlocutious | (adjective) roundabout and unnecessarily wordy | Synonyms: ambagious, circumlocutory, periphrastic |
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| circumlocutory | (adjective) roundabout and unnecessarily wordy | Synonyms: ambagious, circumlocutious, periphrastic |
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| circumpolar | (adjective) located or found throughout a polar region | - |
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| (adjective) (of a celestial body) continually visible above the horizon during the entire 360 degrees of daily travel | - |
| circumscribed | (adjective) subject to limits or subjected to limits | Synonyms: limited |
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| circumspect | (adjective) heedful of potential consequences | Synonyms: discreet |
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| circumstantial | (adjective) fully detailed and specific about particulars | - |
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| clairvoyant | (adjective) perceiving things beyond the natural range of the senses | - |
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| (adjective) foreseeing the future | Synonyms: precognitive, second-sighted |
| confirmable | (adjective) capable of being tested (verified or falsified) by experiment or observation | Synonyms: falsifiable, verifiable |
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| confirmative | (adjective) serving to support or corroborate | Synonyms: collateral, confirmatory, confirming, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying |
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| confirmatory | (adjective) serving to support or corroborate | Synonyms: collateral, confirmative, confirming, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying |
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| confirmed | (adjective) having been established or made firm or received the rite of confirmation | - |
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| (adjective) of persons; not subject to change | - |
| confirming | (adjective) indicating existence or presence of a suspected condition or pathogen | Synonyms: positive |
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| (adjective) serving to support or corroborate | Synonyms: collateral, confirmative, confirmatory, corroborative, corroboratory, substantiating, substantiative, validating, validatory, verificatory, verifying |
| conspirative | (adjective) relating to or characteristic of conspiracy or conspirators | Synonyms: conspiratorial |
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| conspiratorial | (adjective) relating to or characteristic of conspiracy or conspirators | Synonyms: conspirative |
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| debonair | (adjective) having a cheerful, lively, and self-confident air | Synonyms: chipper, debonaire, jaunty |
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| (adjective) having a sophisticated charm | Synonyms: debonaire, debonnaire, suave |
| debonaire | (adjective) having a cheerful, lively, and self-confident air | Synonyms: chipper, debonair, jaunty |
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| (adjective) having a sophisticated charm | Synonyms: debonair, debonnaire, suave |
| debonnaire | (adjective) having a sophisticated charm | Synonyms: debonair, debonaire, suave |
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| delirious | (adjective) experiencing delirium | Synonyms: hallucinating |
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| (adjective) marked by uncontrolled excitement or emotion | Synonyms: excited, frantic, mad, unrestrained |
| desirable | (adjective) worth having or seeking or achieving | - |
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| (adjective) worthy of being chosen especially as a spouse | Synonyms: suitable, worthy |
| desired | (adjective) wanted intensely | Synonyms: craved |
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| desirous | (adjective) having or expressing desire for something | Synonyms: wishful |
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| despairing | (adjective) arising from or marked by despair or loss of hope | Synonyms: desperate |
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| dire | (adjective) fraught with extreme danger; nearly hopeless | Synonyms: desperate |
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| (adjective) causing fear or dread or terror | Synonyms: awful, direful, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
| direct | (adjective) direct in spatial dimensions; proceeding without deviation or interruption; straight and short | - |
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| (adjective) (of a current) flowing in one direction only | - |
| (adjective) straightforward in means or manner or behavior or language or action | - |
| (adjective) similar in nature or effect or relation to another quantity | - |
| (adjective) in a straight unbroken line of descent from parent to child | Synonyms: lineal |
| (adjective) moving from west to east on the celestial sphere; or--for planets--around the sun in the same direction as the Earth | - |
| (adjective) lacking compromising or mitigating elements | Synonyms: exact |
| (adjective) in precisely the same words used by a writer or speaker | Synonyms: verbatim |
| (adjective) having no intervening persons, agents, conditions | Synonyms: unmediated |
| (adjective) being an immediate result or consequence | - |
| directed | (adjective) manageable by a supervising agent | - |
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| (adjective) (often used in combination) having a specified direction | - |
| directing | (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directional, directive, guiding |
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| directional | (adjective) relating to or indicating directions in space | - |
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| (adjective) relating to direction toward a (nonspatial) goal | - |
| (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directing, directive, guiding |
| directionless | (adjective) aimlessly drifting | Synonyms: adrift, afloat, aimless, planless, rudderless, undirected |
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| directive | (adjective) showing the way by conducting or leading; imposing direction on | Synonyms: directing, directional, guiding |
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| direful | (adjective) causing fear or dread or terror | Synonyms: awful, dire, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible |
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| dirigible | (adjective) capable of being steered or directed | Synonyms: steerable |
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| dirt | (adjective) (of roads) not leveled or drained; unsuitable for all year travel | Synonyms: ungraded |
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| dirty | (adjective) soiled or likely to soil with dirt or grime | Synonyms: soiled, unclean |
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| (adjective) (of behavior or especially language) characterized by obscenity or indecency | - |
| (adjective) spreading pollution or contamination; especially radioactive contamination | Synonyms: contaminating |
| (adjective) unethical or dishonest | Synonyms: shoddy, sordid |
| (adjective) expressing or revealing hostility or dislike | - |
| (adjective) obtained illegally or by improper means | Synonyms: ill-gotten |
| (adjective) (of a manuscript) defaced with changes | Synonyms: foul, marked-up |
| (adjective) (of color) discolored by impurities; not bright and clear | Synonyms: dingy, muddied, muddy |
| (adjective) vile; despicable | Synonyms: filthy, lousy |
| (adjective) contaminated with infecting organisms | Synonyms: pestiferous |
| (adjective) unpleasantly stormy | - |
| (adjective) violating accepted standards or rules | Synonyms: cheating, foul, unsporting, unsportsmanlike |
| disconfirming | (adjective) not indicating the presence of microorganisms or disease or a specific condition | Synonyms: negative |
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| (adjective) establishing as invalid or untrue | Synonyms: invalidating |
| dispirited | (adjective) filled with melancholy and despondency | Synonyms: blue, depressed, down, down in the mouth, downcast, downhearted, gloomy, grim, low-spirited, low |
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| (adjective) marked by low spirits; showing no enthusiasm | Synonyms: listless |
| dispiriting | (adjective) destructive of morale and self-reliance | Synonyms: demoralising, demoralizing, disheartening |
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| doctrinaire | (adjective) stubbornly insistent on theory without regard for practicality or suitability | - |
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| downstair | (adjective) on or of lower floors of a building | Synonyms: downstairs |
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| downstairs | (adjective) on or of lower floors of a building | Synonyms: downstair |
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| empiric | (adjective) derived from experiment and observation rather than theory | Synonyms: empirical |
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| (adjective) relying on medical quackery | Synonyms: empirical |
| empirical | (adjective) derived from experiment and observation rather than theory | Synonyms: empiric |
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| (adjective) relying on medical quackery | Synonyms: empiric |
| encircled | (adjective) confined on all sides | Synonyms: surrounded |
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| encircling | (adjective) being all around the edges; enclosing | Synonyms: skirting |
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| entire | (adjective) (of leaves or petals) having a smooth edge; not broken up into teeth or lobes | - |
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| (adjective) (used of domestic animals) sexually competent | Synonyms: intact |
| (adjective) constituting the full quantity or extent; complete | Synonyms: full, total |
| (adjective) constituting the undiminished entirety; lacking nothing essential especially not damaged | Synonyms: intact, integral |
| environmental | (adjective) concerned with the ecological effects of altering the environment | - |
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| (adjective) of or relating to the external conditions or surroundings | - |
| expiratory | (adjective) of or relating to the breathing out phase of respiration | - |
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| expired | (adjective) having come to an end or become void after passage of a period of time | - |
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| extirpable | (adjective) capable of being totally destroyed or wiped out | Synonyms: exterminable |
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| extraordinaire | (adjective) extraordinary in a particular capacity | - |
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