| agon | (noun) a festivity in ancient Greece at which competitors contended for prizes | - |
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| agonist | (noun) (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction | - |
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| (noun) a muscle that contracts while another relaxes | - |
| (noun) someone involved in a contest or battle (as in an agon) | - |
| (noun) the principal character in a work of fiction | Synonyms: protagonist |
| agony | (noun) intense feelings of suffering; acute mental or physical pain | Synonyms: torment, torture |
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| (noun) a state of acute pain | Synonyms: excruciation, suffering |
| agora | (noun) 100 agorot equal 1 shekel in Israel | - |
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| (noun) a place of assembly for the people in ancient Greece | Synonyms: public square |
| (noun) the marketplace in ancient Greece | - |
| agoraphobia | (noun) a morbid fear of open spaces (as fear of being caught alone in some public place) | - |
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| agouti | (noun) agile long-legged rabbit-sized rodent of Central America and South America and the West Indies; valued as food | Synonyms: Dasyprocta aguti |
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| algolagnia | (noun) sexual pleasure derived from inflicting or experiencing pain | Synonyms: algophilia |
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| algology | (noun) the branch of botany that studies algae | Synonyms: phycology |
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| algometer | (noun) device for measuring pain caused by pressure | - |
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| algometry | (noun) measuring sensitivity to pain or pressure | - |
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| algophilia | (noun) sexual pleasure derived from inflicting or experiencing pain | Synonyms: algolagnia |
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| algophobia | (noun) a morbid fear of pain | - |
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| algorism | (noun) computation with Arabic figures | - |
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| (noun) the Arabic (or decimal) system of numeration | - |
| algorithm | (noun) a precise rule (or set of rules) specifying how to solve some problem | Synonyms: algorithmic program, algorithmic rule |
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| allegoresis | (noun) the interpretation of written, oral, or artistic expression as allegory. | - |
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| allegoricalness | (noun) The state or quality of being allegorical. | - |
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| allegoriser | (noun) someone who communicates in allegories | Synonyms: allegorizer |
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| allegorizer | (noun) someone who communicates in allegories | Synonyms: allegoriser |
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| allegory | (noun) a short moral story (often with animal characters) | Synonyms: apologue, fable, parable |
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| (noun) an expressive style that uses fictional characters and events to describe some subject by suggestive resemblances; an extended metaphor | - |
| (noun) a visible symbol representing an abstract idea | Synonyms: emblem |
| allergology | (noun) the branch of medical science that studies the causes and treatment of allergies | - |
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| allgood | (noun) European plant naturalized in North America; often collected from the wild as a potherb | Synonyms: Chenopodium bonus-henricus, fat hen, good-king-henry, wild spinach |
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| amblygonite | (noun) a white or grey mineral consisting of lithium aluminum phosphate; a source of lithium | - |
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| amigo | (noun) a friend or comrade | - |
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| amphigory | (noun) nonsensical writing (usually verse) | Synonyms: nonsense verse |
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| anagoge | (noun) a mystical or allegorical interpretation (especially of Scripture) | - |
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| angostura | (noun) the bitter bark of a South American tree; used in medicines and liqueurs and bitters | Synonyms: angostura bark |
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| antagonism | (noun) (biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure | - |
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| (noun) an actively expressed feeling of dislike and hostility | - |
| (noun) the relation between opposing principles or forces or factors | - |
| (noun) a state of deep-seated ill-will | Synonyms: enmity, hostility |
| antagonist | (noun) a drug that neutralizes or counteracts the effects of another drug | - |
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| (noun) a muscle that relaxes while another contracts | - |
| (noun) someone who offers opposition | Synonyms: adversary, opponent, opposer, resister |
| aragonite | (noun) a mineral form of crystalline calcium carbonate; dimorphic with calcite | - |
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| archegonium | (noun) a female sex organ occurring in mosses, ferns, and most gymnosperms | - |
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| archipelago | (noun) a group of many islands in a large body of water | - |
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| argon | (noun) a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere | Synonyms: Ar, atomic number 18 |
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| argonaut | (noun) someone engaged in a dangerous but potentially rewarding adventure | - |
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| argonon | (noun) any of the chemically inert gaseous elements of the helium group in the periodic table | Synonyms: inert gas, noble gas |
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| argosy | (noun) one or more large merchant ships | - |
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| argot | (noun) a characteristic language of a particular group (as among thieves) | Synonyms: cant, jargon, lingo, patois, slang, vernacular |
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| balibago | (noun) shrubby tree widely distributed along tropical shores; yields a light tough wood used for canoe outriggers and a fiber used for cordage and caulk; often cultivated for ornament | Synonyms: Hibiscus tiliaceus, mahagua, mahoe, majagua, purau |
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| bandwagon | (noun) a large ornate wagon for carrying a musical band | - |
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| (noun) a popular trend that attracts growing support | - |
| battlewagon | (noun) large and heavily armoured warship | Synonyms: battleship |
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| beaugregory | (noun) a blue and yellow damselfish of Bermuda and Florida and the West Indies | Synonyms: Pomacentrus leucostictus |
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| begonia | (noun) any of numerous plants of the genus Begonia grown for their attractive glossy asymmetrical leaves and colorful flowers in usually terminal cymes or racemes | - |
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| bigos | (noun) a Polish stew of cabbage and meat | - |
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| bigot | (noun) a prejudiced person who is intolerant of any opinions differing from his own | - |
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| bigotry | (noun) the intolerance and prejudice of a bigot | - |
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| bingo | (noun) a game in which numbered balls are drawn at random and players cover the corresponding numbers on their cards | Synonyms: beano, keno, lotto |
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| bongo | (noun) large forest antelope of central Africa having a reddish-brown coat with white stripes and spiral horns | Synonyms: Boocercus eurycerus, Tragelaphus eurycerus |
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| (noun) a small drum; played with the hands | Synonyms: bongo drum |
| bugologist | (noun) a zoologist who studies insects | Synonyms: bug-hunter, entomologist |
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| bugology | (noun) the branch of zoology that studies insects | Synonyms: entomology |
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| burgomaster | (noun) a mayor of a municipality in Germany or Holland or Flanders or Austria | - |
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| burgoo | (noun) porridge made of rolled oats | Synonyms: oatmeal |
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| (noun) thick spicy stew of whatever meat and whatever vegetables are available; southern United States | - |
| (noun) a gathering at which burgoo stew is served | - |
| bygone | (noun) past events to be put aside | Synonyms: water under the bridge |
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| cagoule | (noun) lightweight parka; waterproof | - |
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| cairngorm | (noun) a smoky yellow or brown quartz | Synonyms: smoky quartz |
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| cargo | (noun) goods carried by a large vehicle | Synonyms: consignment, freight, lading, load, loading, payload, shipment |
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| categorem | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categoreme |
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| categoreme | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categorem |
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| categorisation | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorization, classification, compartmentalisation, compartmentalization |
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| (noun) the basic cognitive process of arranging into classes or categories | Synonyms: categorization, classification, sorting |
| (noun) a group of people or things arranged by class or category | Synonyms: categorization, classification |
| categorization | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorisation, classification, compartmentalisation, compartmentalization |
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| (noun) the basic cognitive process of arranging into classes or categories | Synonyms: categorisation, classification, sorting |
| (noun) a group of people or things arranged by class or category | Synonyms: categorisation, classification |
| category | (noun) a general concept that marks divisions or coordinations in a conceptual scheme | - |
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| (noun) a collection of things sharing a common attribute | Synonyms: class, family |
| chapelgoer | (noun) a Protestant in England who is not a member of the Church of England | Synonyms: Nonconformist |
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| chigoe | (noun) small tropical flea; the fertile female burrows under the skin of the host including humans | Synonyms: chigger, chigoe flea, Tunga penetrans |
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| churchgoer | (noun) a religious person who goes to church regularly | Synonyms: church member |
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| clangor | (noun) a loud resonant repeating noise | Synonyms: clang, clangoring, clangour, clank, clash, crash |
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| clangoring | (noun) a loud resonant repeating noise | Synonyms: clang, clangor, clangour, clank, clash, crash |
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| clangour | (noun) a loud resonant repeating noise | Synonyms: clang, clangor, clangoring, clank, clash, crash |
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| colugo | (noun) arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps | Synonyms: flying cat, flying lemur |
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| congo | (noun) black tea grown in China | Synonyms: congou, congou tea, English breakfast tea |
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| congou | (noun) black tea grown in China | Synonyms: congo, congou tea, English breakfast tea |
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| contrafagotto | (noun) the bassoon that is the largest instrument in the oboe family | Synonyms: contrabassoon, double bassoon |
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| cosmogony | (noun) the branch of astrophysics that studies the origin and evolution and structure of the universe | Synonyms: cosmogeny, cosmology |
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| dago | (noun) (ethnic slur) offensive term for a person of Italian descent | Synonyms: ginzo, greaseball, Guinea, wop |
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| decagon | (noun) a polygon with 10 sides and 10 angles | - |
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| demagog | (noun) a political leader who seeks support by appealing to popular passions and prejudices | Synonyms: demagogue, rabble-rouser |
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| demagogue | (noun) a political leader who seeks support by appealing to popular passions and prejudices | Synonyms: demagog, rabble-rouser |
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| demagoguery | (noun) impassioned appeals to the prejudices and emotions of the populace | Synonyms: demagogy |
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| demagogy | (noun) impassioned appeals to the prejudices and emotions of the populace | Synonyms: demagoguery |
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| demigod | (noun) a person who is part mortal and part god | Synonyms: daemon |
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| (noun) a person with great powers and abilities | Synonyms: superman, Ubermensch |
| diagonal | (noun) a punctuation mark (/) used to separate related items of information | Synonyms: separatrix, slash, solidus, stroke, virgule |
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| (noun) an oblique line of squares of the same color on a checkerboard | - |
| (noun) (mathematics) a set of entries in a square matrix running diagonally either from the upper left to lower right entry or running from the upper right to lower left entry | - |
| (noun) a line or cut across a fabric that is not at right angles to a side of the fabric | Synonyms: bias |
| (noun) (geometry) a straight line connecting any two vertices of a polygon that are not adjacent | - |
| diagonalisation | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalization |
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| diagonalization | (noun) changing a square matrix to diagonal form (with all non-zero elements on the principal diagonal) | Synonyms: diagonalisation |
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| digoxin | (noun) digitalis preparation (trade name Lanoxin) used to treat congestive heart failure or cardiac arrhythmia; helps the heart beat more forcefully | Synonyms: Lanoxin |
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| dingo | (noun) wolflike yellowish-brown wild dog of Australia | Synonyms: Canis dingo, warragal, warrigal |
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| disgorgement | (noun) the reflex act of ejecting the contents of the stomach through the mouth | Synonyms: emesis, puking, regurgitation, vomit, vomiting |
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| dodecagon | (noun) a twelve-sided polygon | - |
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| dragoman | (noun) an interpreter and guide in the Near East; in the Ottoman Empire in the 18th and 19th centuries a translator of European languages for the Turkish and Arab authorities and most dragomans were Greek (many reached high positions in the government) | - |
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| dragon | (noun) any of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the body | Synonyms: flying dragon, flying lizard |
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| (noun) a fiercely vigilant and unpleasant woman | Synonyms: tartar |
| (noun) a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings | Synonyms: European dragon, firedrake |
| dragonet | (noun) small often brightly colored scaleless marine bottom-dwellers; found in tropical and warm temperate waters of Europe and America | - |
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| dragonfly | (noun) slender-bodied non-stinging insect having iridescent wings that are outspread at rest; adults and nymphs feed on mosquitoes etc. | Synonyms: darning needle, devil's darning needle, mosquito hawk, sewing needle, skeeter hawk, snake doctor, snake feeder |
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| dragonhead | (noun) American herb having sharply serrate lanceolate leaves and spikes of blue to violet flowers | Synonyms: Dracocephalum parviflorum, dragon's head |
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| dragoon | (noun) a member of a European military unit formerly composed of heavily armed cavalrymen | - |
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| drygoods | (noun) textiles or clothing and related merchandise | Synonyms: soft goods |
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| dugong | (noun) sirenian tusked mammal found from eastern Africa to Australia; the flat tail is bilobate | Synonyms: Dugong dugon |
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| dugout | (noun) a fortification of earth; mostly or entirely below ground | Synonyms: bunker |
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| (noun) either of two low shelters on either side of a baseball diamond where the players and coaches sit during the game | - |
| (noun) a canoe made by hollowing out and shaping a large log | Synonyms: dugout canoe, pirogue |
| (noun) a shelter for humans or domesticated animals and livestock based on a hole or depression dug into the ground; can be fully recessed into the earth, with a flat roof covered by ground, semi-recessed, with a constructed wood or sod roof standing out, or dug into a hillside. | Synonyms: dug-out, pit-house, pithouse |
| easygoingness | (noun) being without worry or concern | - |
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| ego | (noun) (psychoanalysis) the conscious mind | - |
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| (noun) your consciousness of your own identity | Synonyms: self |
| (noun) an inflated feeling of pride in your superiority to others | Synonyms: egotism, self-importance |
| egocentric | (noun) a self-centered person with little regard for others | Synonyms: egoist |
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| egocentrism | (noun) concern for your own interests and welfare | Synonyms: egoism, self-centeredness, self-concern, self-interest |
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| egoism | (noun) concern for your own interests and welfare | Synonyms: egocentrism, self-centeredness, self-concern, self-interest |
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| (noun) (ethics) the theory that the pursuit of your own welfare is the basis of morality | - |
| egoist | (noun) a self-centered person with little regard for others | Synonyms: egocentric |
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| (noun) a conceited and self-centered person | Synonyms: egotist, swellhead |
| egomania | (noun) an intense and irresistible love for yourself and concern for your own needs | - |
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