| apprentice | (noun) works for an expert to learn a trade | Synonyms: learner, prentice |
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| (verb) be or work as an apprentice | - |
| apprenticed | (adjective) bound by contract | Synonyms: articled, bound, indentured |
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| apprenticeship | (noun) the position of apprentice | - |
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| appurtenance | (noun) a supplementary component that improves capability | Synonyms: accessory, add-on, supplement |
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| (noun) equipment consisting of miscellaneous articles needed for a particular operation or sport etc. | Synonyms: gear, paraphernalia |
| araceous | (adjective) relating to a plant of the family Araceae | Synonyms: aroid |
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| arboraceous | (adjective) abounding in trees | Synonyms: arboreous, woodsy, woody |
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| arborescent | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike |
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| arced | (adjective) forming or resembling an arch | Synonyms: arched, arching, arciform, arcuate, bowed |
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| arcella | (noun) an amoeba-like protozoan with a chitinous shell resembling an umbrella | - |
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| archdiocesan | (adjective) of or relating to an archdiocese | - |
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| archdiocese | (noun) the diocese of an archbishop | - |
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| arenaceous | (adjective) resembling or containing or abounding in sand; or growing in sandy areas | Synonyms: sandlike, sandy |
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| argillaceous | (adjective) resembling or containing clay | Synonyms: clayey |
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| armistice | (noun) a state of peace agreed to between opponents so they can discuss peace terms | Synonyms: cease-fire, truce |
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| arrogance | (noun) overbearing pride evidenced by a superior manner toward inferiors | Synonyms: haughtiness, hauteur, high-handedness, lordliness |
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| arthrocentesis | (noun) removal of fluid from a joint by centesis | - |
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| artifice | (noun) a deceptive maneuver (especially to avoid capture) | Synonyms: ruse |
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| artificer | (noun) a skilled worker who practices some trade or handicraft | Synonyms: artisan, craftsman, journeyman |
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| (noun) someone who is the first to think of or make something | Synonyms: discoverer, inventor |
| (noun) an enlisted man responsible for the upkeep of small arms and machine guns etc. | Synonyms: armorer, armourer |
| arundinaceous | (adjective) of or relating to or resembling reedlike plants of the genus Arundinaria | - |
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| ascend | (verb) slope upwards | - |
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| (verb) travel up | Synonyms: go up |
| (verb) come up, of celestial bodies | Synonyms: come up, rise, uprise |
| (verb) go along towards (a river's) source | - |
| (verb) move to a better position in life or to a better job | Synonyms: move up, rise |
| (verb) appear to be moving upward, as by means of tendrils | Synonyms: climb up |
| (verb) become king or queen | - |
| (verb) go back in order of genealogical succession | - |
| ascendable | (adjective) capable of being ascended | Synonyms: ascendible, climbable |
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| ascendance | (noun) the state that exists when one person or group has power over another | Synonyms: ascendancy, ascendence, ascendency, control, dominance |
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| ascendancy | (noun) the state that exists when one person or group has power over another | Synonyms: ascendance, ascendence, ascendency, control, dominance |
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| ascendant | (adjective) tending or directed upward | Synonyms: ascendent, ascensive |
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| (adjective) most powerful or important or influential | Synonyms: ascendent, dominating |
| (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, antecedent, ascendent, root |
| (noun) position or state of being dominant or in control | Synonyms: ascendent |
| ascendence | (noun) the state that exists when one person or group has power over another | Synonyms: ascendance, ascendancy, ascendency, control, dominance |
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| ascendency | (noun) the state that exists when one person or group has power over another | Synonyms: ascendance, ascendancy, ascendence, control, dominance |
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| ascendent | (adjective) tending or directed upward | Synonyms: ascendant, ascensive |
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| (adjective) most powerful or important or influential | Synonyms: ascendant, dominating |
| (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, antecedent, ascendant, root |
| (noun) position or state of being dominant or in control | Synonyms: ascendant |
| ascender | (noun) (printing) the part of tall lowercase letters that extends above the other lowercase letters | - |
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| (noun) a lowercase letter that has a part extending above other lowercase letters | - |
| (noun) someone who ascends | - |
| ascendible | (adjective) capable of being ascended | Synonyms: ascendable, climbable |
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| ascending | (adjective) moving or going or growing upward | - |
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| (noun) the act of changing location in an upward direction | Synonyms: ascension, ascent, rise |
| ascension | (noun) the act of changing location in an upward direction | Synonyms: ascending, ascent, rise |
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| (noun) a movement upward; rise above the ground | Synonyms: ascent, rise, rising |
| (noun) (astronomy) the rising of a star above the horizon | - |
| ascensional | (adjective) tending to rise | - |
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| ascensive | (adjective) tending or directed upward | Synonyms: ascendant, ascendent |
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| ascent | (noun) the act of changing location in an upward direction | Synonyms: ascending, ascension, rise |
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| (noun) a movement upward; rise above the ground | Synonyms: ascension, rise, rising |
| (noun) an upward slope or grade (as in a road) | Synonyms: acclivity, climb, raise, rise, upgrade |
| ascertain | (verb) be careful or certain to do something; make certain of something | Synonyms: assure, check, control, ensure, insure, see, see to it |
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| (verb) learn or discover with certainty | - |
| (verb) find out, learn, or determine with certainty, usually by making an inquiry or other effort | Synonyms: check, determine, find out, learn, see, watch |
| (verb) establish after a calculation, investigation, experiment, survey, or study | Synonyms: determine, find, find out |
| ascertainable | (adjective) capable of being ascertained or found out | Synonyms: discoverable |
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| ascertained | (adjective) discovered or determined by scientific observation | Synonyms: discovered, observed |
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| ascesis | (noun) rigorous self-denial and active self-restraint | Synonyms: asceticism |
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| ascetic | (adjective) pertaining to or characteristic of an ascetic or the practice of rigorous self-discipline | Synonyms: ascetical |
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| (adjective) practicing great self-denial | Synonyms: ascetical, austere, spartan |
| (noun) someone who practices self denial as a spiritual discipline | Synonyms: abstainer |
| ascetical | (adjective) pertaining to or characteristic of an ascetic or the practice of rigorous self-discipline | Synonyms: ascetic |
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| (adjective) practicing great self-denial | Synonyms: ascetic, austere, spartan |
| ascetically | (adverb) in an ascetic manner | - |
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| asceticism | (noun) rigorous self-denial and active self-restraint | Synonyms: ascesis |
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| (noun) the trait of great self-denial (especially refraining from worldly pleasures) | Synonyms: austerity, nonindulgence |
| (noun) the doctrine that through renunciation of worldly pleasures it is possible to achieve a high spiritual or intellectual state | - |
| asclepiadaceous | (adjective) of or relating to plants of the milkweed family | - |
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| ascomycete | (noun) any fungus of the class Ascomycetes (or subdivision Ascomycota) in which the spores are formed inside an ascus | Synonyms: ascomycetous fungus |
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| ascomycetous | (adjective) related to or characteristic of fungi of the class Ascomycetes | - |
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| askance | (adjective) (used especially of glances) directed to one side with or as if with doubt or suspicion or envy | Synonyms: askant, asquint, sidelong, squint-eyed, squint, squinty |
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| (adverb) with a side or oblique glance | - |
| (adverb) with suspicion or disapproval | - |
| assistance | (noun) the activity of contributing to the fulfillment of a need or furtherance of an effort or purpose | Synonyms: aid, assist, help |
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| (noun) a person or thing that is a resource that helps make something easier or possible to do | Synonyms: aid, help |
| (noun) gift of money or other material help to support a person or cause | Synonyms: aid, economic aid, economic assistance, financial aid, financial assistance |
| assonance | (noun) the repetition of similar vowels in the stressed syllables of successive words | Synonyms: vowel rhyme |
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| assurance | (noun) freedom from doubt; belief in yourself and your abilities | Synonyms: authority, confidence, self-assurance, self-confidence, sureness |
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| (noun) a statement intended to inspire confidence | - |
| (noun) a binding commitment to do or give or refrain from something | Synonyms: pledge |
| (noun) a British term for some kinds of insurance | - |
| astringence | (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringency |
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| attendance | (noun) the act of being present (at a meeting or event etc.) | Synonyms: attending |
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| (noun) the number of people that are present | - |
| (noun) the frequency with which a person is present | - |
| audience | (noun) a conference (usually with someone important) | Synonyms: consultation, interview |
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| (noun) a gathering of spectators or listeners at a (usually public) performance | - |
| (noun) the part of the general public interested in a source of information, entertainment, or a product/service | - |
| (noun) an opportunity to state your case and be heard | Synonyms: hearing |
| auspice | (noun) a favorable omen | - |
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| auspices | (noun) kindly endorsement and guidance | Synonyms: aegis, protection |
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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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| avarice | (noun) reprehensible acquisitiveness; insatiable desire for wealth (personified as one of the deadly sins) | Synonyms: avaritia, covetousness, greed, rapacity |
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| (noun) extreme greed for material wealth | Synonyms: avariciousness, covetousness, cupidity |
| avocet | (noun) long-legged web-footed black-and-white shorebird with slender upward-curving bill | - |
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| avoidance | (noun) deliberately avoiding; keeping away from or preventing from happening | Synonyms: dodging, shunning, turning away |
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| backspace | (noun) the typewriter key used for back spacing | Synonyms: backspace key, backspacer |
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| (verb) hit the backspace key on a computer or typewriter keyboard | - |
| backspacer | (noun) the typewriter key used for back spacing | Synonyms: backspace, backspace key |
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| balance | (noun) a scale for weighing; depends on pull of gravity | - |
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| (noun) a weight that balances another weight | Synonyms: counterbalance, counterpoise, counterweight, equaliser, equalizer |
| (noun) a wheel that regulates the rate of movement in a machine; especially a wheel oscillating against the hairspring of a timepiece to regulate its beat | Synonyms: balance wheel |
| (noun) harmonious arrangement or relation of parts or elements within a whole (as in a design) | Synonyms: proportion, proportionality |
| (noun) (mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane | Synonyms: correspondence, symmetricalness, symmetry |
| (noun) equality between the totals of the credit and debit sides of an account | - |
| (noun) the difference between the totals of the credit and debit sides of an account | - |
| (noun) something left after other parts have been taken away | Synonyms: remainder, residual, residue, residuum, rest |
| (noun) equality of distribution | Synonyms: counterbalance, equilibrium, equipoise |
| (noun) a state of equilibrium | - |
| (verb) hold or carry in equilibrium | Synonyms: poise |
| (verb) compute credits and debits of an account | - |
| (verb) bring into balance or equilibrium | Synonyms: equilibrate, equilibrise, equilibrize |
| (verb) be in equilibrium | - |
| balanced | (adjective) being in a state of proper equilibrium | - |
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| balancer | (noun) either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight | Synonyms: halter, haltere |
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| (noun) an acrobat who balances himself in difficult positions | - |
| 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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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| barycenter | (noun) (astronomy) the common center of mass around which two or more bodies revolve | - |
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| basidiomycete | (noun) any of various fungi of the subdivision Basidiomycota | Synonyms: basidiomycetous fungi |
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| basidiomycetous | (adjective) pertaining to or characteristic of fungi of the class Basidiomycetes | - |
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| bechance | (verb) happen, occur, or be the case in the course of events or by chance | Synonyms: befall, happen |
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| (verb) become of; happen to | Synonyms: befall, betide |
| belligerence | (noun) a natural disposition to be hostile | Synonyms: aggressiveness, pugnacity |
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| (noun) hostile or warlike attitude or nature | Synonyms: belligerency |
| benefice | (noun) an endowed church office giving income to its holder | Synonyms: ecclesiastical benefice |
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| (verb) endow with a benefice | - |
| beneficed | (adjective) having a benefice | - |
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| beneficence | (noun) the quality of being kind or helpful or generous | - |
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| (noun) doing good; feeling beneficent | - |
| beneficent | (adjective) doing or producing good | - |
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| (adjective) generous in assistance to the poor | Synonyms: benevolent, eleemosynary, philanthropic |
| benevolence | (noun) an act intending or showing kindness and good will | Synonyms: benefaction |
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| (noun) an inclination to do kind or charitable acts | - |
| (noun) disposition to do good | - |
| berceuse | (noun) a quiet song intended to lull a child to sleep | Synonyms: cradlesong, lullaby |
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| betulaceous | (adjective) of or pertaining to or characteristic of trees of the birch family | - |
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| bicentenary | (adjective) of or relating to or completing a period of 200 years | Synonyms: bicentennial |
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| (noun) the 200th anniversary (or the celebration of it) | Synonyms: bicentennial |
| bicentennial | (adjective) of or relating to or completing a period of 200 years | Synonyms: bicentenary |
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| (noun) the 200th anniversary (or the celebration of it) | Synonyms: bicentenary |
| bicentric | (adjective) having two centers | - |
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| bicephalous | (adjective) having two heads | - |
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| biceps | (noun) any skeletal muscle having two origins (but especially the muscle that flexes the forearm) | - |
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| biface | (adjective) having two faces or fronts | Synonyms: bifacial |
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| bignoniaceous | (adjective) of or pertaining to or characteristic of plants of the family Bignoniaceae | - |
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| biodefence | (noun) procedures involved in taking defensive measures against attacks using biological agents | Synonyms: biodefense, biological defence, biological defense |
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| bioluminescence | (noun) luminescence produced by physiological processes (as in the firefly) | - |
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| bioluminescent | (adjective) (of living organisms) emitting light | - |
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| bioscience | (noun) any of the branches of natural science dealing with the structure and behavior of living organisms | Synonyms: life science |
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| birefringence | (noun) splitting a ray into two parallel rays polarized perpendicularly | Synonyms: double refraction |
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| birthplace | (noun) the place where someone was born | Synonyms: place of birth |
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| (noun) where something originated or was nurtured in its early existence | Synonyms: cradle, place of origin, provenance, provenience |
| blackface | (noun) the makeup (usually burnt cork) used by a performer in order to imitate a Negro | - |
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| blastocele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocoel, blastocoele, cleavage cavity, segmentation cavity |
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| blastomycete | (noun) any of various yeastlike budding fungi of the genus Blastomyces; cause disease in humans and other animals | - |
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| bocce | (noun) Italian bowling played on a long narrow dirt court | Synonyms: bocci, boccie |
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| bodice | (noun) part of a dress above the waist | - |
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| boldface | (noun) a typeface with thick heavy lines | Synonyms: bold, bold face |
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| (verb) print in boldface | - |
| bonce | (noun) informal terms for a human head | Synonyms: attic, bean, dome, noggin, noodle |
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| boniface | (noun) the owner or manager of an inn | Synonyms: host, innkeeper |
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