| adynamia | (noun) lack of strength or vigor (especially from illness) | - |
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| aerodynamics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aeromechanics |
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| alloantibody | (noun) an antibody that occurs naturally against foreign tissues from a person of the same species | Synonyms: isoantibody |
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| amphidiploidy | (noun) the condition of being amphidiploid | - |
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| aneuploidy | (noun) an abnormality involving a chromosome number that is not an exact multiple of the haploid number (one chromosome set is incomplete) | - |
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| anodyne | (noun) a medicine used to relieve pain | Synonyms: analgesic, pain pill, painkiller |
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| antibody | (noun) any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response | - |
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| astrodynamics | (noun) the branch of astronomy that studies the motion of natural and artificial bodies in space | - |
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| atherodyde | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: athodyd, flying drainpipe, ramjet, ramjet engine |
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| athodyd | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: atherodyde, flying drainpipe, ramjet, ramjet engine |
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| autoantibody | (noun) an antibody acting against tissues of the organism that produces it | - |
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| baldy | (noun) a person whose head is bald or shaved | Synonyms: baldhead, baldpate, skin, skinhead |
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| bandyleg | (noun) a leg bowed outward at the knee (or below the knee) | Synonyms: bandy leg, bow leg, bowleg, genu varum, tibia vara |
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| bastardy | (noun) the status of being born to parents who were not married | Synonyms: bar sinister, illegitimacy |
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| bawdy | (noun) lewd or obscene talk or writing | Synonyms: bawdry |
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| bawdyhouse | (noun) a building where prostitutes are available | Synonyms: bagnio, bordello, brothel, cathouse, house of ill repute, house of prostitution, sporting house, whorehouse |
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| biddy | (noun) young bird especially of domestic fowl | Synonyms: chick |
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| (noun) adult female chicken | Synonyms: hen |
| biodynamics | (noun) the branch of biology dealing with energy or the activity of living organisms. | - |
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| blackbody | (noun) a hypothetical object capable of absorbing all the electromagnetic radiation falling on it | Synonyms: black body, full radiator |
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| body | (noun) the external structure of a vehicle | - |
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| (noun) a resonating chamber in a musical instrument (as the body of a violin) | Synonyms: soundbox |
| (noun) the property of holding together and retaining its shape | Synonyms: consistence, consistency, substance |
| (noun) the main mass of a thing | - |
| (noun) the entire physical structure of an organism (an animal, plant, or human being) | Synonyms: organic structure |
| (noun) the body excluding the head and neck and limbs | Synonyms: torso, trunk |
| (noun) a natural object consisting of a dead animal or person | Synonyms: dead body |
| (noun) the central message of a communication | - |
| (noun) a group of persons associated by some common tie or occupation and regarded as an entity | - |
| (noun) a collection of particulars considered as a system | - |
| (noun) an individual 3-dimensional object that has mass and that is distinguishable from other objects | - |
| bodybuilder | (noun) someone who does special exercises to develop a brawny musculature | Synonyms: muscle-builder, muscle builder, musclebuilder, muscleman |
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| bodybuilding | (noun) exercise that builds muscles through tension | Synonyms: anaerobic exercise, muscle building, musclebuilding |
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| bodyguard | (noun) a group of men who escort and protect some important person | - |
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| (noun) someone who escorts and protects a prominent person | Synonyms: escort |
| bodywork | (noun) the work of making or repairing vehicle bodies | - |
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| (noun) the exterior body of a motor vehicle | - |
| bradycardia | (noun) abnormally slow heartbeat | - |
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| brandy | (noun) distilled from wine or fermented fruit juice | - |
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| brandyball | (noun) a British candy flavored with brandy | - |
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| brandysnap | (noun) a gingersnap flavored with brandy | - |
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| broody | (noun) a domestic hen ready to brood | Synonyms: brood hen, broody hen, setting hen, sitter |
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| buddy | (noun) a close friend who accompanies his buddies in their activities | Synonyms: brother, chum, crony, pal, sidekick |
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| burgundy | (noun) a dark purplish-red to blackish-red color | - |
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| busybody | (noun) a person who meddles in the affairs of others | Synonyms: nosey-parker, nosy-parker, quidnunc |
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| cacodyl | (noun) the univalent group derived from arsine | Synonyms: arsenic group, cacodyl group, cacodyl radical |
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| (noun) a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air | Synonyms: tetramethyldiarsine |
| caddy | (noun) a can for storing tea | Synonyms: tea caddy |
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| candy | (noun) a rich sweet made of flavored sugar and often combined with fruit or nuts | Synonyms: confect |
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| candyfloss | (noun) a candy made by spinning sugar that has been boiled to a high temperature | Synonyms: cotton candy, spun sugar |
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| candymaker | (noun) someone who makes candies and other sweets | Synonyms: confectioner |
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| candytuft | (noun) any of various flowering plants of the genus Iberis cultivated for their showy clusters of white to red or purple flowers; native to Mediterranean region | - |
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| candyweed | (noun) bog plant of pine barrens of southeastern United States having spikes of irregular yellow-orange flowers | Synonyms: orange milkwort, Polygala lutea, yellow bachelor's button, yellow milkwort |
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| chiropody | (noun) the branch of medicine concerned with the feet | Synonyms: podiatry |
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| chondrodystrophy | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, achondroplasty, osteosclerosis congenita |
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| comedy | (noun) light and humorous drama with a happy ending | - |
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| (noun) a comic incident or series of incidents | Synonyms: clowning, drollery, funniness |
| condyle | (noun) a round bump on a bone where it forms a joint with another bone | - |
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| condylion | (noun) the craniometric point at the tip of the mandibular condyle | - |
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| crawdaddy | (noun) small freshwater decapod crustacean that resembles a lobster | Synonyms: crawdad, crawfish, crayfish |
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| cryptorchidy | (noun) failure of one or both testes to move into the scrotum as the male fetus develops | Synonyms: cryptorchidism, cryptorchism |
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| cuddy | (noun) the galley or pantry of a small ship | - |
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| custody | (noun) holding by the police | - |
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| (noun) (with `in') guardianship over; in divorce cases it is the right to house and care for and discipline a child | Synonyms: hands |
| (noun) a state of being confined (usually for a short time) | Synonyms: detainment, detention, hold |
| daddy | (noun) an informal term for a father; probably derived from baby talk | Synonyms: dad, dada, pa, papa, pappa, pop |
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| dandy | (noun) a sailing vessel with two masts; a small mizzen is aft of the rudderpost | Synonyms: yawl |
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| (noun) a man who is much concerned with his dress and appearance | Synonyms: beau, clotheshorse, dude, fashion plate, fop, gallant, sheik, swell |
| dandyism | (noun) the manner and dress of a fop or dandy | Synonyms: foppishness |
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| diploidy | (noun) the condition of being diploid | - |
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| dogsbody | (noun) a worker who has to do all the unpleasant or boring jobs that no one else wants to do | - |
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| dowdy | (noun) deep-dish apple dessert covered with a rich crust | Synonyms: pandowdy |
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| dyad | (noun) two items of the same kind | Synonyms: brace, couple, couplet, distich, duad, duet, duo, pair, span, twain, twosome, yoke |
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| dyarchy | (noun) a form of government having two joint rulers | Synonyms: diarchy |
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| dybbuk | (noun) (Jewish folklore) a demon that enters the body of a living person and controls that body's behavior | Synonyms: dibbuk |
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| dye | (noun) a usually soluble substance for staining or coloring e.g. fabrics or hair | Synonyms: dyestuff |
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| dyeing | (noun) the use of dye to change the color of something permanently | - |
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| dyer | (noun) someone whose job is to dye cloth | - |
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| dyestuff | (noun) a usually soluble substance for staining or coloring e.g. fabrics or hair | Synonyms: dye |
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| dyeweed | (noun) small Eurasian shrub having clusters of yellow flowers that yield a dye; common as a weed in Britain and the United States; sometimes grown as an ornamental | Synonyms: dyer's-broom, dyer's greenweed, Genista tinctoria, greenweed, whin, woadwaxen, woodwaxen |
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| dyewood | (noun) any wood from which dye is obtained | - |
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| dying | (noun) the time when something ends | Synonyms: death, demise |
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| dyke | (noun) a barrier constructed to contain the flow of water or to keep out the sea | Synonyms: dam, dike |
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| (noun) (slang) offensive term for a lesbian who is noticeably masculine | Synonyms: butch, dike |
| dynamic | (noun) an efficient incentive | Synonyms: moral force |
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| dynamics | (noun) the branch of mechanics concerned with the forces that cause motions of bodies | Synonyms: kinetics |
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| dynamism | (noun) the activeness of an energetic personality | Synonyms: oomph, pizzaz, pizzazz, zing |
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| (noun) active strength of body or mind | Synonyms: heartiness, vigor, vigour |
| (noun) any of the various theories or doctrines or philosophical systems that attempt to explain the phenomena of the universe in terms of some immanent force or energy | - |
| dynamite | (noun) an explosive containing nitrate sensitized with nitroglycerin absorbed on wood pulp | - |
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| dynamiter | (noun) a person who uses dynamite in a revolutionary cause | Synonyms: dynamitist |
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| dynamitist | (noun) a person who uses dynamite in a revolutionary cause | Synonyms: dynamiter |
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| dynamo | (noun) generator consisting of a coil (the armature) that rotates between the poles of an electromagnet (the field magnet) causing a current to flow in the armature | - |
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| dynamometer | (noun) measuring instrument designed to measure power | Synonyms: ergometer |
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| dynast | (noun) a hereditary ruler | - |
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| dynasty | (noun) a sequence of powerful leaders in the same family | - |
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| dyne | (noun) a unit of force equal to the force that imparts an acceleration of 1 cm/sec/sec to a mass of 1 gram | - |
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| dysaphia | (noun) a disorder in the sense of touch | - |
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| dysarthria | (noun) impaired articulatory ability resulting from defects in the peripheral motor nerves or in the speech musculature | - |
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| dyscalculia | (noun) impaired ability to learn grade-appropriate mathematics | - |
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| dyschezia | (noun) difficulty in defecating (usually as a consequence of long continued voluntary suppression of the urge to defecate) | - |
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| dyscrasia | (noun) an abnormal or physiologically unbalanced state of the body | - |
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| dysentery | (noun) an infection of the intestines marked by severe diarrhea | - |
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| dysfunction | (noun) (medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group | Synonyms: disfunction |
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| dysfunctionality | (noun) The condition of functioning incorrectly or abnormally. | - |
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| dysgenesis | (noun) infertility between hybrids | - |
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| dysgenics | (noun) the study of the operation of factors causing degeneration in the type of offspring produced | Synonyms: cacogenics |
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| dysgraphia | (noun) impaired ability to learn to write | - |
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| dyskinesia | (noun) abnormality in performing voluntary muscle movements | - |
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| dyslectic | (noun) a person who has dyslexia | Synonyms: dyslexic |
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| dyslexia | (noun) impaired ability to learn to read | - |
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| dyslexic | (noun) a person who has dyslexia | Synonyms: dyslectic |
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| dyslogia | (noun) impaired ability to express ideas verbally; usually resulting from difficulties of reasoning (as in feeblemindedness or certain psychoses) | - |
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| dysmenorrhea | (noun) painful menstruation | - |
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| dysomia | (noun) impairment of the sense of smell | - |
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| dysosmia | (noun) a disorder in the sense of smell | Synonyms: olfactory impairment, parosamia |
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| dyspepsia | (noun) a disorder of digestive function characterized by discomfort or heartburn or nausea | Synonyms: indigestion, stomach upset, upset stomach |
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| dyspeptic | (noun) a person suffering from indigestion | - |
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| dysphagia | (noun) condition in which swallowing is difficult or painful | - |
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| dysphasia | (noun) an impairment of language (especially speech production) that is usually due to brain damage | - |
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| dysphemism | (noun) an offensive or disparaging expression that is substituted for an inoffensive one | - |
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