| affidavit | (noun) written declaration made under oath; a written statement sworn to be true before someone legally authorized to administer an oath | - |
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| akvavit | (noun) Scandinavian liquor usually flavored with caraway seeds | Synonyms: aquavit |
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| alphavirus | (noun) an arbovirus of the family Togaviridae that can cause a variety of encephalitis in horses | - |
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| aquavit | (noun) Scandinavian liquor usually flavored with caraway seeds | Synonyms: akvavit |
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| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| atavism | (noun) a reappearance of an earlier characteristic | Synonyms: reversion, throwback |
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| atavist | (noun) an organism that has the characteristics of a more primitive type of that organism | Synonyms: throwback |
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| atavistic | (adjective) characteristic of an atavist | Synonyms: throwback |
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| avian | (adjective) pertaining to or characteristic of birds | - |
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| avianise | (verb) to modify microorganisms by repeated culture in the developing chick embryo | Synonyms: avianize |
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| avianize | (verb) to modify microorganisms by repeated culture in the developing chick embryo | Synonyms: avianise |
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| aviary | (noun) a building where birds are kept | Synonyms: bird sanctuary, volary |
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| aviate | (verb) operate an airplane | Synonyms: fly, pilot |
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| aviation | (noun) travel via aircraft | Synonyms: air, air travel |
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| (noun) the art of operating aircraft | Synonyms: airmanship |
| (noun) the aggregation of a country's military aircraft | Synonyms: air power |
| (noun) the operation of aircraft to provide transportation | - |
| aviator | (noun) someone who operates an aircraft | Synonyms: aeronaut, flier, flyer |
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| aviatress | (noun) a woman aviator | Synonyms: airwoman, aviatrix |
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| aviatrix | (noun) a woman aviator | Synonyms: airwoman, aviatress |
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| avid | (adjective) (often followed by `for') ardently or excessively desirous | Synonyms: devouring, esurient, greedy |
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| (adjective) marked by active interest and enthusiasm | Synonyms: zealous |
| avidity | (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidness, eagerness, keenness |
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| avidly | (adverb) in an avid manner | - |
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| avidness | (noun) a positive feeling of wanting to push ahead with something | Synonyms: avidity, eagerness, keenness |
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| avifauna | (noun) the birds of a particular region or period | - |
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| avifaunal | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunistic |
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| avifaunistic | (adjective) of or relating to birds of a particular region or period | Synonyms: avifaunal |
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| avionic | (adjective) of or relating to avionics | - |
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| avionics | (noun) science and technology of electronic systems and devices for aeronautics and astronautics | - |
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| avirulent | (adjective) not virulent; unable to produce disease | - |
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| avitaminosis | (noun) any of several diseases caused by deficiency of one or more vitamins | Synonyms: hypovitaminosis |
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| avitaminotic | (adjective) of or relating to or characteristic of avitaminosis | - |
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| behavior | (noun) manner of acting or controlling yourself | Synonyms: behaviour, conduct, doings |
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| (noun) (psychology) the aggregate of the responses or reactions or movements made by an organism in any situation | Synonyms: behaviour |
| (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behaviour, conduct, demeanor, demeanour, deportment |
| (noun) the action or reaction of something (as a machine or substance) under specified circumstances | Synonyms: behaviour |
| behavioral | (adjective) of or relating to behavior | Synonyms: behavioural |
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| behaviorism | (noun) an approach to psychology that emphasizes observable measurable behavior | Synonyms: behavioristic psychology, behaviourism, behaviouristic psychology |
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| behaviorist | (adjective) of or relating to behaviorism | Synonyms: behavioristic, behaviourist, behaviouristic |
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| (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviourist |
| behavioristic | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behaviourist, behaviouristic |
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| behaviour | (noun) manner of acting or controlling yourself | Synonyms: behavior, conduct, doings |
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| (noun) (psychology) the aggregate of the responses or reactions or movements made by an organism in any situation | Synonyms: behavior |
| (noun) (behavioral attributes) the way a person behaves toward other people | Synonyms: behavior, conduct, demeanor, demeanour, deportment |
| (noun) the action or reaction of something (as a machine or substance) under specified circumstances | Synonyms: behavior |
| behavioural | (adjective) of or relating to behavior | Synonyms: behavioral |
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| behaviourism | (noun) an approach to psychology that emphasizes observable measurable behavior | Synonyms: behaviorism, behavioristic psychology, behaviouristic psychology |
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| behaviourist | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behavioristic, behaviouristic |
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| (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviorist |
| behaviouristic | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behavioristic, behaviourist |
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| bioflavinoid | (noun) a vitamin that maintains the resistance of cell and capillary walls to permeation | Synonyms: citrin, vitamin P |
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| bonavist | (noun) perennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seeds; grown as an ornamental and as a vegetable on the Indian subcontinent; sometimes placed in genus Dolichos | Synonyms: Dolichos lablab, Egyptian bean, hyacinth bean, Indian bean, Lablab purpureus |
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| bunyavirus | (noun) an animal virus belonging to the family Bunyaviridae; can be used as a bioweapon | - |
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| caviar | (noun) salted roe of sturgeon or other large fish; usually served as an hors d'oeuvre | Synonyms: caviare |
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| caviare | (noun) salted roe of sturgeon or other large fish; usually served as an hors d'oeuvre | Synonyms: caviar |
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| cavil | (noun) an evasion of the point of an argument by raising irrelevant distinctions or objections | Synonyms: quibble, quiddity |
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| (verb) raise trivial objections | Synonyms: carp, chicane |
| caviler | (noun) a disputant who quibbles; someone who raises annoying petty objections | Synonyms: caviller, pettifogger, quibbler |
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| caviller | (noun) a disputant who quibbles; someone who raises annoying petty objections | Synonyms: caviler, pettifogger, quibbler |
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| cavitied | (adjective) pitted with cell-like cavities (as a honeycomb) | Synonyms: alveolate, faveolate, honeycombed, pitted |
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| cavity | (noun) (anatomy) a natural hollow or sinus within the body | Synonyms: bodily cavity, cavum |
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| (noun) a sizeable hole (usually in the ground) | Synonyms: pit |
| (noun) soft decayed area in a tooth; progressive decay can lead to the death of a tooth | Synonyms: caries, dental caries, tooth decay |
| (noun) space that is surrounded by something | Synonyms: enclosed space |
| circumnavigate | (verb) travel around, either by plane or ship | Synonyms: compass |
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| circumnavigation | (noun) traveling around something (by ship or plane) | - |
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| clavichord | (noun) an early stringed instrument like a piano but with more delicate sound | - |
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| clavicle | (noun) bone linking the scapula and sternum | Synonyms: collarbone |
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| clavier | (noun) a bank of keys on a musical instrument | Synonyms: fingerboard, piano keyboard |
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| (noun) a stringed instrument that has a keyboard | Synonyms: Klavier |
| concavity | (noun) the property possessed by a concave shape | Synonyms: concaveness |
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| (noun) a shape that curves or bends inward | Synonyms: concave shape, incurvation, incurvature |
| coronavirus | (noun) a viral disease caused by SARS-CoV-2 that caused a global pandemic in 2020 | Synonyms: 2019-nCoV acute respiratory disease, corona, coronavirus disease 2019, COVID-19, novel coronavirus pneumonia, Wuhan coronavirus, Wuhan flu, Wuhan pneumonia, Wuhan virus |
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| craving | (noun) an intense desire for some particular thing | - |
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| davit | (noun) a crane-like device (usually one of a pair) for suspending or lowering equipment (as a lifeboat) | - |
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| delavirdine | (noun) a non-nucleoside reverse transcriptase inhibitor (trade name Rescriptor) used to treat AIDS and HIV | Synonyms: Rescriptor |
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| depravity | (noun) a corrupt or depraved or degenerate act or practice | Synonyms: turpitude |
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| (noun) moral perversion; impairment of virtue and moral principles | Synonyms: corruption, degeneracy, depravation, putrefaction |
| engraving | (noun) making engraved or etched plates and printing designs from them | Synonyms: etching |
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| (noun) a block or plate or other hard surface that has been engraved | - |
| (noun) a print made from an engraving | - |
| favism | (noun) anemia resulting from eating fava beans; victims have an inherited blood abnormality and enzyme deficiency | - |
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| flavin | (noun) a ketone that forms the nucleus of certain natural yellow pigments like riboflavin | - |
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| flavivirus | (noun) animal viruses belonging to the family Flaviviridae | - |
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| gavial | (noun) large fish-eating Indian crocodilian with a long slender snout | Synonyms: Gavialis gangeticus |
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| gravid | (adjective) in an advanced stage of pregnancy | Synonyms: big, enceinte, expectant, great, heavy, large, with child |
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| gravida | (noun) a pregnant woman | - |
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| (noun) the number of the pregnancy that a woman is in | - |
| gravidation | (noun) technical terms for pregnancy | Synonyms: gravidity, gravidness |
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| gravidity | (noun) technical terms for pregnancy | Synonyms: gravidation, gravidness |
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| gravidness | (noun) technical terms for pregnancy | Synonyms: gravidation, gravidity |
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| gravimeter | (noun) a measuring instrument for determining the specific gravity of a liquid or solid | Synonyms: hydrometer |
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| (noun) a measuring instrument for measuring variations in the gravitational field of the earth | Synonyms: gravity meter |
| gravimetric | (adjective) of or relating to hydrometry | Synonyms: hydrometric |
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| gravimetry | (noun) the measurement of specific gravity | Synonyms: hydrometry |
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| gravitas | (noun) formality in bearing and appearance | Synonyms: dignity, lordliness |
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| gravitate | (verb) move due to the pull of gravitation | - |
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| (verb) be attracted to | - |
| (verb) move toward | - |
| gravitation | (noun) a figurative movement toward some attraction | - |
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| (noun) movement downward resulting from gravitational attraction | - |
| (noun) (physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface | Synonyms: gravitational attraction, gravitational force, gravity |
| gravitational | (adjective) of or relating to or caused by gravitation | Synonyms: gravitative |
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| gravitationally | (adverb) with respect to gravitation | - |
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| gravitative | (adjective) of or relating to or caused by gravitation | Synonyms: gravitational |
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| graviton | (noun) a gauge boson that mediates the (extremely weak) gravitational interactions between particles | - |
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| gravity | (noun) a manner that is serious and solemn | Synonyms: graveness, soberness, sobriety, somberness, sombreness |
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| (noun) a solemn and dignified feeling | Synonyms: solemnity |
| (noun) (physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface | Synonyms: gravitation, gravitational attraction, gravitational force |
| hairweaving | (noun) the act of interweaving a hairpiece with your own hair | - |
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| heavily | (adverb) to a considerable degree | Synonyms: to a great extent |
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| (adverb) indulging excessively | Synonyms: hard, intemperately |
| (adverb) slowly as if burdened by much weight | Synonyms: heavy |
| (adverb) in a manner designed for heavy duty | - |
| (adverb) in a heavy-footed manner | - |
| (adverb) with great force | - |
| (adverb) in a labored manner | - |
| heaviness | (noun) the property of being comparatively great in weight | Synonyms: weightiness |
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| (noun) used of a line or mark | Synonyms: thickness |
| (noun) unwelcome burdensome difficulty | Synonyms: burdensomeness, onerousness, oppressiveness |
| (noun) an oppressive quality that is laborious and solemn and lacks grace or fluency | Synonyms: ponderousness |
| (noun) persisting sadness | - |
| heaving | (noun) throwing something heavy (with great effort) | Synonyms: heave |
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| (noun) breathing heavily (as after exertion) | Synonyms: panting |
| (noun) the act of lifting something with great effort | Synonyms: heave |
| (noun) an upward movement (especially a rhythmical rising and falling) | Synonyms: heave |
| hepadnavirus | (noun) a group of animal DNA viruses including viruses of ducks and woodchucks and squirrels and others as well as the virus causing hepatitis B in humans | - |
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| hepatoflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: lactoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G |
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| indinavir | (noun) a protease inhibitor (trade name Crixivan) used for treating HIV | Synonyms: Crixivan |
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| knavish | (adjective) marked by skill in deception | Synonyms: crafty, cunning, dodgy, foxy, guileful, slick, sly, tricksy, tricky, wily |
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| knavishly | (adverb) in an subtle, cunning manner | Synonyms: artfully, craftily, cunningly, foxily, slyly, trickily |
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| laborsaving | (adjective) designed to replace or conserve human and especially manual labor | Synonyms: laboursaving |
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| laboursaving | (adjective) designed to replace or conserve human and especially manual labor | Synonyms: laborsaving |
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| lactoflavin | (noun) a B vitamin that prevents skin lesions and weight loss | Synonyms: hepatoflavin, ovoflavin, riboflavin, vitamin B2, vitamin G |
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| lavish | (adjective) very generous | Synonyms: munificent, overgenerous, too-generous, unsparing, unstinted, unstinting |
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| (adjective) characterized by extravagance and profusion | Synonyms: lucullan, plush, plushy |
| (verb) expend profusely; also used with abstract nouns | Synonyms: shower |
| lavishly | (adverb) in a wasteful manner | Synonyms: extravagantly |
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| (adverb) in a rich and lavish manner | Synonyms: extravagantly, richly |
| lavishness | (noun) the activity of excessive spending | Synonyms: extravagance, high life, highlife, prodigality |
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| (noun) the quality possessed by something that is excessively expensive | Synonyms: luxury, sumptuosity, sumptuousness |
| leaving | (noun) the act of departing | Synonyms: departure, going, going away |
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| lifesaving | (noun) saving the lives of drowning persons | - |
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| lyssavirus | (noun) a neurotropic non-arbovirus of the family Rhabdoviridae that causes rabies | - |
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