| acanthocephalan | (noun) any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines | Synonyms: spiny-headed worm |
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| aeroplane | (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: airplane, plane |
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| ailanthus | (noun) any of several deciduous Asian trees of the genus Ailanthus | - |
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| airplane | (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: aeroplane, plane |
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| alanine | (noun) a crystalline amino acid that occurs in many proteins | - |
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| allantoic | (adjective) relating to or characterized by an allantois | - |
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| allantoid | (adjective) shaped like a sausage | Synonyms: sausage-shaped |
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| allantois | (noun) the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals) | - |
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| ambulance | (noun) a vehicle that takes people to and from hospitals | - |
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| ambulant | (adjective) able to walk about | Synonyms: ambulatory |
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| anovulant | (noun) a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception | Synonyms: anovulatory drug, birth control pill, contraceptive pill, oral contraceptive, oral contraceptive pill, pill |
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| anticoagulant | (noun) medicine that prevents or retards the clotting of blood | Synonyms: anticoagulant medication, decoagulant |
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| aplanatic | (adjective) free from or corrected for spherical aberration | - |
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| appellant | (adjective) of or relating to or taking account of appeals (usually legal appeals) | Synonyms: appellate |
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| (noun) the party who appeals a decision of a lower court | Synonyms: plaintiff in error |
| aquaplane | (noun) a board that is pulled by a speedboat as a person stands on it and skims over the top of the water | - |
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| (verb) ride on an aquaplane | - |
| (verb) rise up onto a thin film of water between the tires and road so that there is no more contact with the road | - |
| artlang | (noun) a constructed language designed for aesthetic pleasure. | Synonyms: artistic language |
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| aslant | (adjective) having an oblique or slanted direction | Synonyms: aslope, diagonal, slanted, slanting, sloped, sloping |
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| (adverb) at an oblique angle | Synonyms: athwart, obliquely |
| (adverb) over or across in a slanting direction | - |
| assailant | (noun) someone who attacks | Synonyms: aggressor, assaulter, attacker |
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| avalanche | (noun) a slide of large masses of snow and ice and mud down a mountain | - |
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| (noun) a sudden appearance of an overwhelming number of things | - |
| (verb) gather into a huge mass and roll down a mountain, of snow | Synonyms: roll down |
| avellan | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellane |
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| avellane | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellan |
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| badlands | (noun) deeply eroded barren land | - |
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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 | - |
| balancing | (noun) getting two things to correspond | Synonyms: reconciliation |
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| balanitis | (noun) inflammation of the head of the penis | - |
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| balanoposthitis | (noun) inflammation of both the head of the penis and the foreskin | - |
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| biplane | (noun) old fashioned airplane; has two wings one above the other | - |
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| blanc | (noun) a white sauce of fat, broth, and vegetables (used especially with braised meat) | - |
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| blanch | (verb) turn pale, as if in fear | Synonyms: blench, pale |
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| (verb) cook (vegetables) briefly | Synonyms: parboil |
| blanched | (adjective) anemic looking from illness or emotion | Synonyms: ashen, bloodless, livid, white |
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| (adjective) (especially of plants) developed without chlorophyll by being deprived of light | Synonyms: etiolate, etiolated |
| blancmange | (noun) sweet almond-flavored milk pudding thickened with gelatin or cornstarch; usually molded | - |
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| bland | (adjective) smoothly agreeable and courteous with a degree of sophistication | Synonyms: politic, smooth, suave |
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| (adjective) lacking taste or flavor or tang | Synonyms: flat, flavorless, flavourless, insipid, savorless, savourless, vapid |
| (adjective) lacking stimulating characteristics; uninteresting | Synonyms: flat |
| blandish | (verb) praise somewhat dishonestly | Synonyms: flatter |
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| blandishment | (noun) the act of urging by means of teasing or flattery | Synonyms: wheedling |
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| (noun) flattery intended to persuade | Synonyms: cajolery, palaver |
| blandly | (adverb) in a bland manner | - |
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| blandness | (noun) lacking any distinctive or interesting taste property | Synonyms: insipidity, insipidness |
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| (noun) the quality of being bland and gracious or ingratiating in manner | Synonyms: smoothness, suaveness, suavity |
| (noun) the trait of exhibiting no personal embarrassment or concern | - |
| blank | (adjective) (of a surface) not written or printed on | Synonyms: clean, white |
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| (adjective) not charged with a bullet | - |
| (adjective) complete and absolute | Synonyms: utter |
| (adjective) without comprehension | - |
| (noun) a cartridge containing an explosive charge but no bullet | Synonyms: blank shell, dummy |
| (noun) a piece of material ready to be made into something | - |
| (noun) a blank gap or missing part | Synonyms: lacuna |
| (noun) a blank character used to separate successive words in writing or printing | Synonyms: space |
| (verb) keep the opposing (baseball) team from winning | - |
| blanket | (adjective) broad in scope or content | Synonyms: across-the-board, all-embracing, all-encompassing, all-inclusive, broad, encompassing, extensive, panoptic, wide |
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| (noun) bedding that keeps a person warm in bed | Synonyms: cover |
| (noun) a layer of lead surrounding the highly reactive core of a nuclear reactor | - |
| (noun) anything that covers | Synonyms: mantle |
| (verb) cover as if with a blanket | - |
| (verb) form a blanket-like cover (over) | - |
| blanketed | (adjective) covered with (or as if with) a blanket | - |
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| blankly | (adverb) in a blank and uncomprehending manner | - |
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| blankness | (noun) the state of being blank; void; emptiness | - |
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| blanquillo | (noun) important marine food fishes | Synonyms: tilefish |
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| borderland | (noun) district consisting of the area on either side of a border or boundary of a country or an area | Synonyms: border district, march, marchland |
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| bottomland | (noun) low-lying alluvial land near a river | Synonyms: bottom |
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| calando | (adjective) (music) gradually decreasing in tempo and volume | - |
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| calanthe | (noun) any of various showy orchids of the genus Calanthe having white or yellow or rose-colored flowers and broad leaves folded lengthwise | - |
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| capelan | (noun) very small northern fish; forage for sea birds and marine mammals and other fishes | Synonyms: capelin, caplin |
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| celandine | (noun) perennial herb with branched woody stock and bright yellow flowers | Synonyms: Chelidonium majus, greater celandine, swallow wort, swallowwort |
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| (noun) North American annual plant with usually yellow or orange flowers; grows chiefly on wet rather acid soil | Synonyms: Impatiens capensis, jewelweed, lady's earrings, orange balsam, touch-me-not |
| cholangiography | (noun) roentgenographic examination of the bile ducts after a contrast medium has been injected | - |
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| cholangitis | (noun) inflammation of the bile ducts | - |
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| chorioallantois | (noun) the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois | Synonyms: chorioallantoic membrane |
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| cilantro | (noun) parsley-like herb used as seasoning or garnish | Synonyms: Chinese parsley, coriander |
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| (noun) Old World herb with aromatic leaves and seed resembling parsley | Synonyms: Chinese parsley, coriander, coriander plant, Coriandrum sativum |
| clan | (noun) group of people related by blood or marriage | Synonyms: kin, kin group, kindred, kinship group, tribe |
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| clandestine | (adjective) conducted with or marked by hidden aims or methods | Synonyms: cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground |
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| clang | (noun) a loud resonant repeating noise | Synonyms: clangor, clangoring, clangour, clank, clash, crash |
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| (verb) make a loud noise | Synonyms: clangor |
| clanger | (noun) a conspicuous mistake whose effects seem to reverberate | - |
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| clanging | (adjective) having a loud resonant metallic sound | Synonyms: clangorous |
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| clangor | (noun) a loud resonant repeating noise | Synonyms: clang, clangoring, clangour, clank, clash, crash |
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| (verb) make a loud resonant noise | Synonyms: clangour |
| (verb) make a loud noise | Synonyms: clang |
| clangoring | (noun) a loud resonant repeating noise | Synonyms: clang, clangor, clangour, clank, clash, crash |
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| clangorous | (adjective) having a loud resonant metallic sound | Synonyms: clanging |
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| clangour | (noun) a loud resonant repeating noise | Synonyms: clang, clangor, clangoring, clank, clash, crash |
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| (verb) make a loud resonant noise | Synonyms: clangor |
| clank | (noun) a loud resonant repeating noise | Synonyms: clang, clangor, clangoring, clangour, clash, crash |
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| (verb) make a clank | - |
| clanker | (noun) something that makes a clanking noise. | - |
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| clanking | (adjective) having a hard nonresonant metallic sound | - |
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| clannish | (adjective) characteristic of a clan especially in being unified | - |
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| (adjective) befitting or characteristic of those who incline to social exclusiveness and who rebuff the advances of people considered inferior | Synonyms: cliquish, clubby, snobbish, snobby |
| clannishly | (adverb) in a clannish manner | Synonyms: cliquishly |
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| clannishness | (noun) tendency to associate with only a select group | Synonyms: cliquishness, exclusiveness |
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| clansman | (noun) a male member of a clan | - |
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| clanswoman | (noun) a female member of a clan | - |
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| coagulant | (noun) an agent that produces coagulation | Synonyms: coagulator |
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| coastland | (noun) land in a coastal area | - |
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| colander | (noun) bowl-shaped strainer; used to wash or drain foods | Synonyms: cullender |
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| collembolan | (noun) any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water | Synonyms: springtail |
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| coolant | (noun) a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another | - |
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| coplanar | (adjective) lying in the same plane | - |
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| counterbalance | (noun) a weight that balances another weight | Synonyms: balance, counterpoise, counterweight, equaliser, equalizer |
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| (noun) a compensating equivalent | Synonyms: offset |
| (noun) equality of distribution | Synonyms: balance, equilibrium, equipoise |
| (verb) oppose and mitigate the effects of by contrary actions | Synonyms: counteract, countervail, neutralize |
| (verb) contrast with equal weight or force | Synonyms: oppose |
| (verb) adjust for | Synonyms: compensate, correct, even off, even out, even up, make up |
| counterbalanced | (adjective) brought into equipoise by means of a weight or force that offsets another | Synonyms: counterpoised |
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| counterplan | (noun) a plot intended to subvert another plot | Synonyms: counterplot |
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| courlan | (noun) wading bird of South America and Central America | Synonyms: Aramus guarauna |
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| decoagulant | (noun) medicine that prevents or retards the clotting of blood | Synonyms: anticoagulant, anticoagulant medication |
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| deplane | (verb) get off an airplane | - |
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| dihydroxyphenylalanine | (noun) amino acid that is formed in the liver and converted into dopamine in the brain | Synonyms: dopa |
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| dreamland | (noun) a pleasing country existing only in dreams or imagination | Synonyms: dreamworld, never-never land |
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| eggplant | (noun) egg-shaped vegetable having a shiny skin typically dark purple but occasionally white or yellow | Synonyms: aubergine, mad apple |
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| (noun) hairy upright herb native to southeastern Asia but widely cultivated for its large glossy edible fruit commonly used as a vegetable | Synonyms: aubergine, brinjal, eggplant bush, garden egg, mad apple, Solanum melongena |
| eglantine | (noun) Eurasian rose with prickly stems and fragrant leaves and bright pink flowers followed by scarlet hips | Synonyms: briar, brier, Rosa eglanteria, sweetbriar, sweetbrier |
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| elan | (noun) enthusiastic and assured vigor and liveliness | - |
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| (noun) distinctive and stylish elegance | Synonyms: dash, flair, panache, style |
| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardor, ardour, zeal |
| eland | (noun) either of two large African antelopes of the genus Taurotragus having short spirally twisted horns in both sexes | - |
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| emplane | (verb) board a plane | Synonyms: enplane |
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| enplane | (verb) board a plane | Synonyms: emplane |
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| esplanade | (noun) a long stretch of open level ground (paved or grassy) for walking beside the seashore | - |
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| exoplanet | (noun) A planet which exists outside Earth's solar system | - |
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| explanandum | (noun) (logic) a statement of something (a fact or thing or expression) to be explained | Synonyms: explicandum |
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| explanans | (noun) (logic) statements that explain the explicandum; the explanatory premises | - |
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| explanation | (noun) thought that makes something comprehensible | - |
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| (noun) a statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc. | Synonyms: account |
| (noun) the act of explaining; making something plain or intelligible | - |
| explanatory | (adjective) serving or intended to explain or make clear | - |
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| fairyland | (noun) something existing solely in the imagination (but often mistaken for reality) | Synonyms: fantasy world, phantasy world |
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| (noun) the enchanted realm of fairies | Synonyms: faerie, faery |
| falanga | (noun) a form of torture in which the soles of the feet are beaten with whips or cudgels | Synonyms: bastinado |
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| falangist | (noun) a Spanish member of General Franco's political party | Synonyms: phalangist |
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