| abaca | (noun) Philippine banana tree having leafstalks that yield Manila hemp used for rope and paper etc | Synonyms: Manila hemp, Musa textilis |
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| (noun) a kind of hemp obtained from the abaca plant in the Philippines | Synonyms: Manila hemp, Manilla hemp |
| abracadabra | (noun) gibberish and nonsense | - |
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| acacia | (noun) any of various spiny trees or shrubs of the genus Acacia | - |
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| academe | (noun) the academic world | Synonyms: academia |
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| academia | (noun) the academic world | Synonyms: academe |
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| academic | (adjective) associated with academia or an academy | - |
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| (adjective) marked by a narrow focus on or display of learning especially its trivial aspects | Synonyms: donnish, pedantic |
| (adjective) hypothetical or theoretical and not expected to produce an immediate or practical result | - |
| (noun) an educator who works at a college or university | Synonyms: academician, faculty member |
| academically | (adverb) in regard to academic matters | - |
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| academician | (noun) an educator who works at a college or university | Synonyms: academic, faculty member |
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| (noun) a scholar who is skilled in academic disputation | Synonyms: schoolman |
| (noun) someone elected to honorary membership in an academy | - |
| academicianship | (noun) the position of member of an honorary academy | - |
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| academicism | (noun) orthodoxy of a scholastic variety | Synonyms: academism, scholasticism |
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| (noun) Purely speculative thoughts and attitudes. | - |
| (noun) a style of painting and sculpture produced under the influence of European academies of art. | Synonyms: academic art, academism |
| academism | (noun) orthodoxy of a scholastic variety | Synonyms: academicism, scholasticism |
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| (noun) a style of painting and sculpture produced under the influence of European academies of art. | Synonyms: academic art, academicism |
| academy | (noun) a learned establishment for the advancement of knowledge | - |
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| (noun) a secondary school (usually private) | - |
| (noun) a school for special training | - |
| (noun) an institution for the advancement of art or science or literature | Synonyms: honorary society |
| acantha | (noun) any sharply pointed projection | Synonyms: spine, spur |
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| acanthion | (noun) the craniometric point at the anterior extremity of the intermaxillary suture | - |
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| 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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| acanthocyte | (noun) an abnormal red blood cell that has thorny projections of protoplasm | - |
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| acanthocytosis | (noun) the presence of acanthocytes in the blood stream (as in abetalipoproteinemia) | - |
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| acanthoid | (adjective) shaped like a spine or thorn | Synonyms: acanthous, spinous |
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| acantholysis | (noun) a breakdown of a cell layer in the epidermis (as in pemphigus) | - |
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| acanthoma | (noun) a neoplasm originating in the epidermis | Synonyms: skin tumor |
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| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| acanthosis | (noun) an abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis) | - |
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| acanthotic | (adjective) of or relating to or having acanthosis | - |
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| acanthous | (adjective) shaped like a spine or thorn | Synonyms: acanthoid, spinous |
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| acanthus | (noun) any plant of the genus Acanthus having large spiny leaves and spikes or white or purplish flowers; native to Mediterranean region but widely cultivated | - |
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| acapnia | (noun) a state in which the level of carbon dioxide in the blood is lower than normal; can result from deep or rapid breathing | Synonyms: hypocapnia |
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| acapnial | (adjective) relating to or demonstrating acapnia | Synonyms: acapnic, acapnotic |
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| acapnic | (adjective) relating to or demonstrating acapnia | Synonyms: acapnial, acapnotic |
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| acapnotic | (adjective) relating to or demonstrating acapnia | Synonyms: acapnial, acapnic |
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| acaracide | (noun) a chemical agent used to kill mites | Synonyms: acaricide |
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| acardia | (noun) congenital absence of the heart (as in the development of some monsters) | - |
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| acariasis | (noun) infestation with itch mites | Synonyms: acaridiasis, acariosis |
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| acaricide | (noun) a chemical agent used to kill mites | Synonyms: acaracide |
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| acarid | (noun) very small free-living arachnid that is parasitic on animals or plants; related to ticks | - |
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| acaridiasis | (noun) infestation with itch mites | Synonyms: acariasis, acariosis |
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| acarine | (noun) mite or tick | - |
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| acariosis | (noun) infestation with itch mites | Synonyms: acariasis, acaridiasis |
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| acarophobia | (noun) a morbid fear of small insects and mites and worms | - |
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| acarpellous | (adjective) having no carpels | Synonyms: acarpelous |
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| acarpelous | (adjective) having no carpels | Synonyms: acarpellous |
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| acarpous | (adjective) producing no fruit | - |
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| acarus | (noun) any of several mites of the order Acarina | Synonyms: genus Acarus |
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| acaryote | (noun) a cell without a nucleus (as an erythrocyte) | Synonyms: akaryocyte, akaryote |
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| acatalectic | (adjective) (verse) metrically complete; especially having the full number of syllables in the final metrical foot | - |
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| (noun) (prosody) a line of verse that has the full number of syllables | - |
| acataphasia | (noun) a disorder in which a lesion to the central nervous system leaves you unable to formulate a statement or to express yourself in an organized manner | - |
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| acathexia | (noun) an inability to retain bodily secretions | - |
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| acathexis | (noun) (psychoanalysis) a lack of cathexis; a condition in which significant objects or memories arouse no emotion in an individual | - |
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| acaudal | (adjective) lacking a tail or taillike appendage | Synonyms: acaudate |
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| acaudate | (adjective) lacking a tail or taillike appendage | Synonyms: acaudal |
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| acaulescent | (adjective) (of plants) having no apparent stem above ground | Synonyms: stemless |
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| aguacate | (noun) a pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seed | Synonyms: alligator pear, avocado, avocado pear |
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| alpaca | (noun) domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco | Synonyms: Lama pacos |
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| (noun) a thin glossy fabric made of the wool of the Lama pacos, or made of a rayon or cotton imitation of that wool | - |
| (noun) wool of the alpaca | - |
| ammoniacal | (adjective) pertaining to or containing or similar to ammonia | Synonyms: ammoniac |
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| antimacassar | (noun) a piece of ornamented cloth that protects the back of a chair from hair oils | - |
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| aphrodisiacal | (adjective) stimulating sexual desire | Synonyms: aphrodisiac, sexy |
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| barbacan | (noun) a tower that is part of a defensive structure (such as a castle) | Synonyms: barbican |
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| bibliomaniacal | (adjective) characteristic of or characterized by or noted for bibliomania | - |
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| butacaine | (noun) a white crystalline ester that is applied to mucous membranes as a local anesthetic | Synonyms: butacaine sulfate |
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| cacao | (noun) tropical American tree producing cacao beans | Synonyms: cacao tree, chocolate tree, Theobroma cacao |
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| caracal | (noun) of deserts of northern Africa and southern Asia | Synonyms: desert lynx, Lynx caracal |
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| caracara | (noun) any of various long-legged carrion-eating hawks of South America and Central America | - |
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| catacaustic | (noun) a caustic curve formed by light reflecting from a curved surface. | - |
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| chachalaca | (noun) slender arboreal guan resembling a wild turkey; native to Central America and Mexico; highly regarded as game birds | - |
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| cloaca | (noun) a waste pipe that carries away sewage or surface water | Synonyms: sewer, sewerage |
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| (noun) (zoology) the cavity (in birds, reptiles, amphibians, most fish, and monotremes but not other mammals) at the end of the digestive tract into which the intestinal, genital, and urinary tracts open | - |
| coelacanth | (noun) fish thought to have been extinct since the Cretaceous period but found in 1938 off the coast of Africa | Synonyms: Latimeria chalumnae |
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| conacaste | (noun) tropical South American tree having a wide-spreading crown of bipinnate leaves and coiled ear-shaped fruits; grown for shade and ornament as well as valuable timber | Synonyms: elephant's ear, Enterolobium cyclocarpa |
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| coracan | (noun) East Indian cereal grass whose seed yield a somewhat bitter flour, a staple in the Orient | Synonyms: African millet, corakan, Eleusine coracana, finger millet, kurakkan, ragee, ragi |
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| curacao | (noun) flavored with sour orange peel | Synonyms: curacoa |
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| demoniacal | (adjective) of, pertaining to, or like a demon or possession by a demon | Synonyms: demoniac, possessed |
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| demoniacally | (adverb) in a very agitated manner; as if possessed by an evil spirit | Synonyms: frenetically |
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| dracaena | (noun) an agave that is often cultivated for its decorative foliage | - |
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| facade | (noun) the face or front of a building | Synonyms: frontage, frontal |
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| (noun) a showy misrepresentation intended to conceal something unpleasant | Synonyms: window dressing |
| fracas | (noun) noisy quarrel | Synonyms: affray, altercation |
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| guacamole | (noun) a dip made of mashed avocado mixed with chopped onions and other seasonings | - |
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| heliacal | (adjective) pertaining to or near the sun; especially the first rising of a star after and last setting before its invisibility owing to its conjunction with the sun | Synonyms: heliac |
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| heterostracan | (noun) extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian | - |
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| hypochondriacal | (adjective) suffering from hypochondria | Synonyms: hypochondriac |
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| implacable | (adjective) incapable of being placated | - |
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| jacamar | (noun) tropical American insectivorous bird having a long sharp bill and iridescent green or bronze plumage | - |
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| jacaranda | (noun) an important Brazilian timber tree yielding a heavy hard dark-colored wood streaked with black | Synonyms: Brazilian rosewood, caviuna wood, Dalbergia nigra |
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| keratoacanthoma | (noun) skin tumor that grows rapidly (especially in older people) and resembles a carcinoma but does not spread; it usually disappears spontaneously, often leaving a scar | - |
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| macabre | (adjective) shockingly repellent; inspiring horror | Synonyms: ghastly, grim, grisly, gruesome, sick |
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| macadam | (noun) a paved surface having compressed layers of broken rocks held together with tar | Synonyms: tarmac, tarmacadam |
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| (noun) broken stone used in macadamized roadways | - |
| (verb) surface with macadam | Synonyms: macadamise, macadamize, tarmac |
| macadamia | (noun) any tree of the genus Macadamia | Synonyms: macadamia tree |
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| macadamise | (verb) surface with macadam | Synonyms: macadam, macadamize, tarmac |
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| macadamize | (verb) surface with macadam | Synonyms: macadam, macadamise, tarmac |
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| macamba | (noun) tropical American feather palm having a swollen spiny trunk and edible nuts | Synonyms: Acrocomia aculeata, gri-gri, grugru, grugru palm |
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| macaque | (noun) short-tailed monkey of rocky regions of Asia and Africa | - |
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| macaron | (noun) a sweet meringue-based confection made with egg white, icing sugar, granulated sugar, almond powder or ground almond, and food colouring. | - |
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| macaroni | (noun) pasta in the form of slender tubes | - |
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| (noun) a British dandy in the 18th century who affected Continental mannerisms | - |
| macaronic | (adjective) of or containing a mixture of Latin words and vernacular words jumbled together | - |
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| macaroon | (noun) chewy cookie usually containing almond paste | - |
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| macaw | (noun) long-tailed brilliantly colored parrot of Central America and South America; among the largest and showiest of parrots | - |
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| maniacal | (adjective) wildly disordered | Synonyms: maniac |
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| maniacally | (adverb) in a maniacal manner or to a maniacal degree | - |
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| maraca | (noun) a percussion instrument consisting of a hollow gourd containing pebbles or beans; often played in pairs | - |
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| megacardia | (noun) an abnormal enlargement of the heart | Synonyms: cardiomegaly, enlarged heart, megalocardia |
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| megalomaniacal | (adjective) suffering from megalomania | Synonyms: megalomanic |
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| metacarpal | (adjective) of or relating to the metacarpus | - |
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| (noun) any bone of the hand between the wrist and fingers | Synonyms: metacarpal bone |
| metacarpus | (noun) the part of the hand between the carpus and phalanges | - |
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