| are | (noun) a unit of surface area equal to 100 square meters | Synonyms: ar |
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| area | (noun) a part of a structure having some specific characteristic or function | - |
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| (noun) the extent of a 2-dimensional surface enclosed within a boundary | Synonyms: expanse, surface area |
| (noun) a part of an animal that has a special function or is supplied by a given artery or nerve | Synonyms: region |
| (noun) a subject of study | - |
| (noun) a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography) | Synonyms: country |
| (noun) a particular environment or walk of life | Synonyms: arena, domain, field, orbit, sphere |
| areal | (adjective) of or relating to or involving an area | - |
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| areaway | (noun) a passageway between buildings or giving access to a basement | - |
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| areca | (noun) any of several tall tropical palms native to southeastern Asia having egg-shaped nuts | - |
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| areflexia | (noun) absence of a reflex; a sign of possible nerve damage | - |
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| arena | (noun) a playing field where sports events take place | Synonyms: scene of action |
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| (noun) a large structure for open-air sports or entertainments | Synonyms: bowl, sports stadium, stadium |
| (noun) the central area of an ancient Roman amphitheater where contests and spectacles were held; especially an area that was strewn with sand | - |
| (noun) a particular environment or walk of life | Synonyms: area, domain, field, orbit, sphere |
| arenaceous | (adjective) resembling or containing or abounding in sand; or growing in sandy areas | Synonyms: sandlike, sandy |
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| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| arenicolous | (adjective) growing or living or burrowing in sand | - |
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| areola | (noun) small circular area such as that around the human nipple or an inflamed area around a pimple or insect bite | Synonyms: ring of color |
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| (noun) small space in a tissue or body part such as the area between veins on a leaf or an insect's wing | - |
| areolar | (adjective) relating to or like or divided into areolae | Synonyms: areolate |
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| areolate | (adjective) relating to or like or divided into areolae | Synonyms: areolar |
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| arere | (noun) large west African tree having large palmately lobed leaves and axillary cymose panicles of small white flowers and one-winged seeds; yields soft white to pale yellow wood | Synonyms: obeche, obechi, samba, Triplochiton scleroxcylon |
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| arete | (noun) a sharp narrow ridge found in rugged mountains | - |
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| arethusa | (noun) any of several bog orchids of the genus Arethusa having 1 or 2 showy flowers | - |
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| armature | (noun) coil in which voltage is induced by motion through a magnetic field | - |
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| armoire | (noun) a large wardrobe or cabinet; originally used for storing weapons | - |
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| armored | (adjective) protected by armor (used of persons or things military) | Synonyms: armoured |
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| (adjective) used of animals; provided with protective covering | Synonyms: armoured |
| (adjective) equipped with the complete arms and armor of a warrior | Synonyms: panoplied |
| armorer | (noun) a manufacturer of firearms | Synonyms: armourer |
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| (noun) an enlisted man responsible for the upkeep of small arms and machine guns etc. | Synonyms: armourer, artificer |
| (noun) a worker skilled in making armor or arms | Synonyms: armourer |
| armoured | (adjective) protected by armor (used of persons or things military) | Synonyms: armored |
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| (adjective) used of animals; provided with protective covering | Synonyms: armored |
| armourer | (noun) a manufacturer of firearms | Synonyms: armorer |
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| (noun) an enlisted man responsible for the upkeep of small arms and machine guns etc. | Synonyms: armorer, artificer |
| (noun) a worker skilled in making armor or arms | Synonyms: armorer |
| armrest | (noun) a support for the arm | - |
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| arrears | (noun) an unpaid overdue debt | - |
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| (noun) the state of being behind in payments | - |
| arrest | (noun) the act of apprehending (especially apprehending a criminal) | Synonyms: apprehension, catch, collar, pinch, taking into custody |
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| (noun) the state of inactivity following an interruption | Synonyms: check, halt, hitch, stay, stop, stoppage |
| (verb) hold back, as of a danger or an enemy; check the expansion or influence of | Synonyms: check, contain, hold back, stop, turn back |
| (verb) take into custody | Synonyms: apprehend, collar, cop, nab, nail, pick up |
| (verb) attract and fix | Synonyms: catch, get |
| (verb) cause to come to an abrupt stop | Synonyms: halt, hold |
| arrester | (noun) a restraint that slows airplanes as they land on the flight deck of an aircraft carrier | Synonyms: arrester hook |
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| arresting | (adjective) commanding attention | Synonyms: sensational, stunning |
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| arthromere | (noun) any of the segments in the body of a jointed animal like an arthropod | - |
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| arthrospore | (noun) one of a string of thick walled vegetative resting cells formed by some algae and fungi | - |
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| (noun) a body that resembles a spore but is not an endospore; produced by some bacteria | - |
| ascospore | (noun) sexually produced fungal spore formed within an ascus | - |
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| ashore | (adverb) towards the shore from the water | - |
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| aspire | (verb) have an ambitious plan or a lofty goal | Synonyms: aim, draw a bead on, shoot for |
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| aspirer | (noun) an ambitious and aspiring young person | Synonyms: aspirant, hopeful, wannabe, wannabee |
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| assure | (verb) be careful or certain to do something; make certain of something | Synonyms: ascertain, check, control, ensure, insure, see, see to it |
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| (verb) inform positively and with certainty and confidence | Synonyms: tell |
| (verb) assure somebody of the truth of something with the intention of giving the listener confidence | - |
| (verb) make a promise or commitment | Synonyms: promise |
| (verb) make certain of | Synonyms: ensure, guarantee, insure, secure |
| assured | (adjective) marked by assurance; exhibiting confidence | - |
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| (adjective) characterized by certainty or security | - |
| assuredly | (adverb) without a doubt | - |
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| assuredness | (noun) great coolness and composure under strain | Synonyms: aplomb, cool, poise, sang-froid |
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| astereognosis | (noun) a loss of the ability to recognize objects by handling them | Synonyms: tactile agnosia |
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| asthenosphere | (noun) the lower layer of the crust | - |
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| atmosphere | (noun) a distinctive but intangible quality surrounding a person or thing | Synonyms: air, aura |
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| (noun) the mass of air surrounding the Earth | Synonyms: air |
| (noun) the envelope of gases surrounding any celestial body | - |
| (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade | Synonyms: atm, standard atmosphere, standard pressure |
| (noun) the weather or climate at some place | Synonyms: atmospheric state |
| (noun) a particular environment or surrounding influence | Synonyms: ambiance, ambience |
| atresia | (noun) an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent | - |
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| attire | (noun) clothing of a distinctive style or for a particular occasion | Synonyms: dress, garb |
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| (verb) put on special clothes to appear particularly appealing and attractive | Synonyms: deck out, deck up, dress up, fancy up, fig out, fig up, get up, gussy up, overdress, prink, rig out, tog out, tog up, trick out, trick up |
| attired | (adjective) dressed or clothed especially in fine attire; often used in combination | Synonyms: appareled, dressed, garbed, garmented, habilimented, robed |
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| aureate | (adjective) having the deep slightly brownish color of gold | Synonyms: gilded, gilt, gold, golden |
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| (adjective) elaborately or excessively ornamented | Synonyms: flamboyant, florid |
| aureole | (noun) an indication of radiant light drawn around the head of a saint | Synonyms: aura, gloriole, glory, halo, nimbus |
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| (noun) the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse | Synonyms: corona |
| auriculare | (noun) the craniometric point at the center of the opening of the external acoustic meatus | Synonyms: auricular point |
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| aurorean | (adjective) characteristic of the dawn | Synonyms: auroral |
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| austere | (adjective) practicing great self-denial | Synonyms: ascetic, ascetical, spartan |
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| (adjective) of a stern or strict bearing or demeanor; forbidding in aspect | Synonyms: stern |
| (adjective) severely simple | Synonyms: severe, stark, stern |
| austerely | (adverb) in an austere fashion | - |
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| austereness | (noun) extreme plainness | Synonyms: severeness, severity |
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| authoress | (noun) a woman author | - |
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| autocorrect | (noun) a system for automatically correcting text | - |
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| autofluorescence | (noun) self-induced fluorescence | - |
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| autofluorescent | (adjective) emitting light via self-induced fluorescence | - |
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| autoregulation | (noun) (physiology) processes that maintain a generally constant physiological state in a cell or organism | - |
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| autostereotype | (noun) the standardized mental picture held in common by members of a cultural group depicting an oversimplified image of themselves and their behaviour. | - |
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| aviatress | (noun) a woman aviator | Synonyms: airwoman, aviatrix |
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| aware | (adjective) (sometimes followed by `of') having or showing knowledge or understanding or realization or perception | Synonyms: cognisant, cognizant |
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| (adjective) bearing in mind; attentive to | Synonyms: mindful |
| awareness | (noun) having knowledge of | Synonyms: cognisance, cognizance, consciousness, knowingness |
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| (noun) state of elementary or undifferentiated consciousness | Synonyms: sentience |
| axletree | (noun) a dead axle on a carriage or wagon that has terminal spindles on which the wheels revolve | - |
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| aztreonam | (noun) an antibiotic (trade name Azactam) used against severe infections; has minimal side effects | Synonyms: Azactam |
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| azure | (adjective) of a deep somewhat purplish blue color similar to that of a clear October sky | Synonyms: bright blue, cerulean, sky-blue |
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| (noun) a light shade of blue | Synonyms: cerulean, lazuline, sapphire, sky-blue |
| (verb) color azure | - |
| baccalaureate | (noun) an academic degree conferred on someone who has successfully completed undergraduate studies | Synonyms: bachelor's degree |
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| (noun) a farewell sermon to a graduating class at their commencement ceremonies | - |
| bachelorette | (noun) a young unmarried woman who lives alone | Synonyms: bachelor girl |
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| backbreaking | (adjective) characterized by effort to the point of exhaustion; especially physical effort | Synonyms: arduous, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome |
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| backfire | (noun) a miscalculation that recoils on its maker | Synonyms: boomerang |
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| (noun) a loud noise made by the explosion of fuel in the manifold or exhaust of an internal combustion engine | - |
| (noun) the backward escape of gases and unburned gunpowder after a gun is fired | Synonyms: blowback |
| (noun) a fire that is set intentionally in order to slow an approaching forest fire or grassfire by clearing a burned area in its path | - |
| (verb) set a controlled fire to halt an advancing forest to prairie fire | - |
| (verb) emit a loud noise as a result of undergoing a backfire | - |
| (verb) come back to the originator of an action with an undesired effect | Synonyms: backlash, recoil |
| backrest | (noun) a support that you can lean against while sitting | Synonyms: back |
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| bacteremia | (noun) transient presence of bacteria (or other microorganisms) in the blood | Synonyms: bacteriaemia, bacteriemia |
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| bacteremic | (adjective) of or relating to or having bacteremia | - |
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| badgerer | (noun) someone who tries to embarrass you with gibes and questions and objections | Synonyms: heckler |
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| balefire | (noun) a large outdoor fire that is lighted as a signal or in celebration | Synonyms: bonfire |
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| balldress | (noun) a suit or dress for formal occasions | - |
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| banneret | (noun) a knight honored for valor; entitled to display a square banner and to hold higher command | Synonyms: knight banneret, knight of the square flag |
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| barbwire | (noun) strong wire with barbs at regular intervals used to prevent passage | Synonyms: barbed wire |
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| bare | (adjective) lacking its natural or customary covering | - |
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| (adjective) not having a protective covering | Synonyms: unsheathed |
| (adjective) having everything extraneous removed including contents | Synonyms: stripped |
| (adjective) providing no shelter or sustenance | Synonyms: barren, bleak, desolate, stark |
| (adjective) lacking in magnitude or quantity | Synonyms: scanty, spare |
| (adjective) just barely adequate or within a lower limit | Synonyms: marginal |
| (adjective) apart from anything else; without additions or modifications | Synonyms: mere, simple |
| (adjective) lacking embellishment or ornamentation | Synonyms: plain, spare, unembellished, unornamented |
| (adjective) having no clothes on the body | Synonyms: au naturel, naked, nude |
| (adjective) lacking a surface finish such as paint | Synonyms: unfinished |
| (verb) lay bare | Synonyms: denudate, denude, strip |
| (verb) make public | Synonyms: air, publicise, publicize |
| (verb) expose to view | - |
| bareback | (adjective) riding without a saddle | Synonyms: barebacked |
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| (adverb) without a saddle | Synonyms: barebacked |
| barebacked | (adjective) riding without a saddle | Synonyms: bareback |
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| (adverb) without a saddle | Synonyms: bareback |
| bareboat | (noun) a vessel (such as a yacht) that can be chartered without a captain or crew or provisions | - |
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| bareboating | (noun) boating by chartering a bareboat and providing your own crew and provisions | - |
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| bared | (adjective) having the head uncovered | Synonyms: bareheaded |
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| barefaced | (adjective) with no effort to conceal | Synonyms: bald |
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| (adjective) unrestrained by convention or propriety | Synonyms: audacious, bald-faced, bodacious, brassy, brazen-faced, brazen, insolent |
| barefacedly | (adverb) without shame | Synonyms: shamelessly, unashamedly |
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| barefoot | (adjective) without shoes | Synonyms: barefooted, shoeless |
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| (adverb) without shoes on | Synonyms: barefooted |
| barefooted | (adjective) without shoes | Synonyms: barefoot, shoeless |
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| (adverb) without shoes on | Synonyms: barefoot |
| barehanded | (adjective) with bare hands | - |
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| bareheaded | (adjective) having the head uncovered | Synonyms: bared |
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| barelegged | (adjective) having the legs uncovered by clothing | - |
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| barely | (adverb) only a very short time before | Synonyms: hardly, just, scarce, scarcely |
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| (adverb) almost not | Synonyms: hardly, scarce, scarcely |
| (adverb) by a little | Synonyms: just |
| bareness | (noun) an extreme lack of furnishings or ornamentation | Synonyms: starkness |
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| (noun) the state of being unclothed and exposed (especially of a part of the body) | - |
| (noun) a bleak and desolate atmosphere | Synonyms: bleakness, desolation, nakedness |
| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| barred | (adjective) marked with stripes or bands | - |
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| (adjective) preventing entry or exit or a course of action | Synonyms: barricaded, blockaded |
| barrel | (noun) a cylindrical container that holds liquids | Synonyms: cask |
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| (noun) a tube through which a bullet travels when a gun is fired | Synonyms: gun barrel |
| (noun) any of various units of capacity | Synonyms: bbl |
| (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrelful |
| (noun) a bulging cylindrical shape; hollow with flat ends | Synonyms: drum |
| (verb) put in barrels | - |
| barreled | (adjective) put in or stored in a barrel | Synonyms: barrelled |
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| (adjective) (of an arrow) tapered toward both ends | Synonyms: barrelled |
| barrelfish | (noun) blackish fish of New England waters | Synonyms: black rudderfish, Hyperglyphe perciformis |
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| barrelful | (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrel |
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| barrelhouse | (noun) a cheap drinking and dancing establishment | Synonyms: honky-tonk |
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| barrelled | (adjective) put in or stored in a barrel | Synonyms: barreled |
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| (adjective) (of an arrow) tapered toward both ends | Synonyms: barreled |
| barrels | (noun) the amount that many barrels might hold | - |
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| barren | (adjective) providing no shelter or sustenance | Synonyms: bare, bleak, desolate, stark |
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| (adjective) completely wanting or lacking | Synonyms: destitute, devoid, free, innocent |
| (adjective) not bearing offspring | - |
| (noun) an uninhabited wilderness that is worthless for cultivation | Synonyms: waste, wasteland |
| barrenness | (noun) the quality of yielding nothing of value | Synonyms: aridity, fruitlessness |
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| (noun) the state (usually of a woman) of having no children or being unable to have children | - |