| enchantress | (noun) a female sorcerer or magician | Synonyms: witch |
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| (noun) a woman who is considered to be dangerously seductive | Synonyms: Delilah, femme fatale, siren, temptress |
| enhancement | (noun) an improvement that makes something more agreeable | Synonyms: sweetening |
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| enhancer | (noun) anything that serves by contrast to call attention to another thing's good qualities | Synonyms: foil |
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| enkephalin | (noun) an endorphin having opiate qualities that occurs in the brain and spinal cord and elsewhere | - |
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| enthalpy | (noun) (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure | Synonyms: H, heat content, total heat |
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| epha | (noun) an ancient Hebrew unit of dry measure equal to about a bushel | Synonyms: ephah |
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| ephah | (noun) an ancient Hebrew unit of dry measure equal to about a bushel | Synonyms: epha |
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| epikeratophakia | (noun) using a piece of donated corneal tissue to repair the eye of someone who has had a cataract removed | - |
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| epiphany | (noun) a divine manifestation | - |
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| epithalamium | (noun) an ode honoring a bride and bridegroom | - |
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| eschalot | (noun) type of onion plant producing small clustered mild-flavored bulbs used as seasoning | Synonyms: Allium ascalonicum, Allium cepa aggregatum, multiplier onion, shallot |
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| eschar | (noun) a dry scab formed on the skin following a burn or cauterization of the skin | - |
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| eschatologist | (noun) a theologian who specializes in eschatology | - |
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| eschatology | (noun) the branch of theology that is concerned with such final things as death and Last Judgment; Heaven and Hell; the ultimate destiny of humankind | - |
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| eschaton | (noun) (New Testament) day at the end of time following Armageddon when God will decree the fates of all individual humans according to the good and evil of their earthly lives | Synonyms: crack of doom, Day of Judgement, Day of Judgment, day of reckoning, Doomsday, doomsday, end of the world, Judgement Day, Judgment Day, Last Day, Last Judgement, Last Judgment |
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| esophagitis | (noun) inflammation of the esophagus; often caused by gastroesophageal reflux | Synonyms: oesophagitis |
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| esophagoscope | (noun) an optical instrument for examining the inside of the esophagus | Synonyms: oesophagoscope |
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| esophagus | (noun) the passage between the pharynx and the stomach | Synonyms: gorge, gullet, oesophagus |
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| ethanal | (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs | Synonyms: acetaldehyde |
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| ethanamide | (noun) a colorless solid amide of acetic acid used as a solvent and in the synthesis of organic compounds | Synonyms: acetamide |
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| ethane | (noun) a colorless odorless alkane gas used as fuel | Synonyms: C2H6 |
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| ethanediol | (noun) a sweet but poisonous syrupy liquid used as an antifreeze and solvent | Synonyms: ethylene glycol, glycol |
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| ethanoate | (noun) a salt or ester of acetic acid | Synonyms: acetate |
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| ethanol | (noun) the intoxicating agent in fermented and distilled liquors; used pure or denatured as a solvent or in medicines and colognes and cleaning solutions and rocket fuel; proposed as a renewable clean-burning additive to gasoline | Synonyms: ethyl alcohol, fermentation alcohol, grain alcohol |
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| ethoxyethane | (noun) a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic | Synonyms: diethyl ether, divinyl ether, ether, ethyl ether, vinyl ether |
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| euthanasia | (noun) the act of killing someone painlessly (especially someone suffering from an incurable illness) | Synonyms: mercy killing |
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| exarchate | (noun) a diocese of the Eastern Orthodox Church | Synonyms: eparchy |
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| exchange | (noun) reciprocal transfer of equivalent sums of money (especially the currencies of different countries) | Synonyms: interchange |
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| (noun) the act of putting one thing or person in the place of another: | Synonyms: commutation, substitution |
| (noun) the act of changing one thing for another thing | Synonyms: interchange |
| (noun) the act of giving something in return for something received | - |
| (noun) (chess) the capture by both players (usually on consecutive moves) of pieces of equal value | - |
| (noun) (chess) gaining (or losing) a rook in return for a knight or bishop | - |
| (noun) (sports) an unbroken sequence of several successive strokes | Synonyms: rally |
| (noun) a workplace for buying and selling; open only to members | - |
| (noun) a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication | Synonyms: central, telephone exchange |
| (noun) a mutual expression of views (especially an unpleasant one) | - |
| (noun) chemical process in which one atom or ion or group changes places with another | - |
| exchangeability | (noun) the quality of being capable of exchange or interchange | Synonyms: fungibility, interchangeability, interchangeableness |
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| exchanger | (noun) one whose business is to exchange the money of one country for that of another country | Synonyms: money changer |
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| exhalation | (noun) the act of expelling air from the lungs | Synonyms: breathing out, expiration |
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| (noun) exhaled breath | Synonyms: halitus |
| exhaust | (noun) system consisting of the parts of an engine through which burned gases or steam are discharged | Synonyms: exhaust system |
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| (noun) gases ejected from an engine as waste products | Synonyms: exhaust fumes, fumes |
| exhaustion | (noun) the act of exhausting something entirely | - |
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| (noun) serious weakening and loss of energy | Synonyms: debilitation, enervation, enfeeblement |
| (noun) extreme fatigue | - |
| exomphalos | (noun) an umbilical hernia at birth in which some abdominal organs push into the umbilical cord | - |
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| exophthalmos | (noun) protrusion of the eyeball from the socket | - |
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| eyeshade | (noun) a brim that projects to the front to shade the eyes | Synonyms: bill, peak, visor, vizor |
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| eyeshadow | (noun) makeup consisting of a cosmetic substance used to darken the eyes | - |
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| farmhand | (noun) a hired hand on a farm | Synonyms: farm worker, field hand, fieldhand |
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| fieldhand | (noun) a hired hand on a farm | Synonyms: farm worker, farmhand, field hand |
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| flowchart | (noun) a diagram of the sequence of operations in a computer program or an accounting system | Synonyms: flow chart, flow diagram, flow sheet |
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| foolhardiness | (noun) the trait of giving little thought to danger | Synonyms: rashness, recklessness |
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| forehand | (noun) (sports) a return made with the palm of the hand facing the direction of the stroke (as in tennis or badminton or squash) | Synonyms: forehand shot, forehand stroke |
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| foreshadowing | (noun) the act of providing vague advance indications; representing beforehand | Synonyms: adumbration, prefiguration |
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| foreshank | (noun) a cut of meat from the upper part of a front leg | - |
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| geisha | (noun) a Japanese woman trained to entertain men with conversation and singing and dancing | Synonyms: geisha girl |
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| geophagia | (noun) eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior | Synonyms: geophagy |
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| geophagy | (noun) eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior | Synonyms: geophagia |
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| gharry | (noun) a horse-drawn carriage in India | - |
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| ghastliness | (noun) the quality of being ghastly | Synonyms: grimness, gruesomeness, luridness |
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| ghat | (noun) stairway in India leading down to a landing on the water | - |
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| ghatti | (noun) an Indian gum from the dhawa tree; used as a substitute for gum arabic | Synonyms: ghatti gum |
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| gildhall | (noun) the meeting place of a medieval guild | - |
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| gingham | (noun) a clothing fabric in a plaid weave | - |
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| goshawk | (noun) large hawk of Eurasia and North America used in falconry | Synonyms: Accipiter gentilis |
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| graham | (noun) flour made by grinding the entire wheat berry including the bran; (`whole meal flour' is British usage) | Synonyms: graham flour, whole meal flour, whole wheat flour |
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| greenshank | (noun) large European sandpiper with greenish legs | Synonyms: Tringa nebularia |
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| guacharo | (noun) nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter | Synonyms: oilbird, Steatornis caripensis |
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| guildhall | (noun) the hall of a guild or corporation | - |
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| gymkhana | (noun) a meet at which riders and horses display a range of skills and aptitudes | - |
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| habanera | (noun) a Cuban dance in duple time | - |
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| (noun) music composed in duple time for dancing the habanera | - |
| haberdasher | (noun) a merchant who sells men's clothing | Synonyms: clothier |
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| haberdashery | (noun) the drygoods sold by a haberdasher | Synonyms: men's furnishings |
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| (noun) a store where men's clothes are sold | Synonyms: clothing store, haberdashery store, mens store |
| habergeon | (noun) (Middle Ages) a light sleeveless coat of chain mail worn under the hauberk | - |
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| habiliment | (noun) a covering designed to be worn on a person's body | Synonyms: article of clothing, clothing, vesture, wear, wearable |
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| habit | (noun) excessive use of drugs | Synonyms: drug abuse, substance abuse |
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| (noun) (psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition | Synonyms: use |
| (noun) a distinctive attire worn by a member of a religious order | - |
| (noun) attire that is typically worn by a horseback rider (especially a woman's attire) | Synonyms: riding habit |
| (noun) an established custom | Synonyms: wont |
| (noun) the general form or mode of growth (especially of a plant or crystal) | - |
| habitability | (noun) suitability for living in or on | Synonyms: habitableness |
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| habitableness | (noun) suitability for living in or on | Synonyms: habitability |
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| habitant | (noun) a person who inhabits a particular place | Synonyms: denizen, dweller, indweller, inhabitant |
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| habitat | (noun) the type of environment in which an organism or group normally lives or occurs | Synonyms: home ground |
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| habitation | (noun) the act of dwelling in or living permanently in a place (said of both animals and men) | Synonyms: inhabitancy, inhabitation |
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| (noun) housing that someone is living in | Synonyms: abode, domicile, dwelling, dwelling house, home |
| (noun) the native habitat or home of an animal or plant | - |
| habituation | (noun) a general accommodation to unchanging environmental conditions | - |
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| (noun) being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) | Synonyms: addiction, dependance, dependence, dependency |
| habitude | (noun) habitual mode of behavior | - |
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| habitue | (noun) a regular patron | Synonyms: fixture, regular |
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| habitus | (noun) constitution of the human body | Synonyms: body-build, build, physique |
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| (noun) person's predisposition to be affected by something (as a disease) | - |
| hacek | (noun) a diacritical mark (an inverted circumflex) placed above certain letters (such as the letter c) to indicate pronunciation | Synonyms: wedge |
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| hachure | (noun) shading consisting of multiple crossing lines | Synonyms: crosshatch, hatch, hatching |
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| hacienda | (noun) the main house on a ranch or large estate | - |
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| (noun) a large estate in Spanish-speaking countries | - |
| hack | (noun) a horse kept for hire | - |
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| (noun) an old or over-worked horse | Synonyms: jade, nag, plug |
| (noun) a saddle horse used for transportation rather than sport etc. | - |
| (noun) a car driven by a person whose job is to take passengers where they want to go in exchange for money | Synonyms: cab, taxi, taxicab |
| (noun) a tool (as a hoe or pick or mattock) used for breaking up the surface of the soil | - |
| (noun) one who works hard at boring tasks | Synonyms: drudge, hacker |
| (noun) a mediocre and disdained writer | Synonyms: hack writer, literary hack |
| (noun) a politician who belongs to a small clique that controls a political party for private rather than public ends | Synonyms: machine politician, political hack, ward-heeler |
| hackamore | (noun) rope or canvas headgear for a horse, with a rope for leading | Synonyms: halter |
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| hackathon | (noun) an event involving a marathon coding session | - |
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| hackberry | (noun) small edible dark purple to black berry with large pits; southern United States | Synonyms: sugarberry |
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| (noun) any of various trees of the genus Celtis having inconspicuous flowers and small berrylike fruits | Synonyms: nettle tree |
| hackbut | (noun) an obsolete firearm with a long barrel | Synonyms: arquebus, hagbut, harquebus |
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| hackee | (noun) small striped semiterrestrial eastern American squirrel with cheek pouches | Synonyms: eastern chipmunk, ground squirrel, striped squirrel, Tamias striatus |
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| hacker | (noun) one who works hard at boring tasks | Synonyms: drudge, hack |
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| (noun) a programmer for whom computing is its own reward; may enjoy the challenge of breaking into other computers but does no harm | - |
| (noun) someone who plays golf poorly | - |
| hackle | (noun) long slender feather on the necks of e.g. turkeys and pheasants | - |
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| hackles | (noun) a feeling of anger and animosity | Synonyms: dander |
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| hackmatack | (noun) poplar of northeastern North America with broad heart-shaped leaves | Synonyms: balsam poplar, Populus balsamifera, tacamahac |
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| hackney | (noun) a compact breed of harness horse | - |
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| (noun) a carriage for hire | Synonyms: hackney carriage, hackney coach |
| hacksaw | (noun) saw used with one hand for cutting metal | Synonyms: hack saw, metal saw |
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| hackwork | (noun) professional work done according to formula | - |
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| (noun) (Literary & Literary Critical Terms) undistinguished literary work produced to order. | - |
| haddock | (noun) important food fish on both sides of the Atlantic; related to cod but usually smaller | Synonyms: Melanogrammus aeglefinus |
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| (noun) lean white flesh of fish similar to but smaller than cod; usually baked or poached or as fillets sauteed or fried | - |
| hadith | (noun) (Islam) the way of life prescribed as normative for Muslims on the basis of the teachings and practices of Muhammad and interpretations of the Koran | Synonyms: Sunna, Sunnah |
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| hadj | (noun) the fifth pillar of Islam is a pilgrimage to Mecca during the month of Dhu al-Hijja; at least once in a lifetime a Muslim is expected to make a religious journey to Mecca and the Kaaba | Synonyms: haj, hajj |
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| hadji | (noun) an Arabic term of respect for someone who has made the pilgrimage to Mecca | Synonyms: haji, hajji |
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| hadron | (noun) any elementary particle that interacts strongly with other particles | - |
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| hadrosaur | (noun) any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic | Synonyms: duck-billed dinosaur, hadrosaurus |
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| hadrosaurus | (noun) any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic | Synonyms: duck-billed dinosaur, hadrosaur |
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| haecceity | (noun) the essence that makes something the kind of thing it is and makes it different from any other | Synonyms: quiddity |
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| haem | (noun) a complex red organic pigment containing iron and other atoms to which oxygen binds | Synonyms: haemitin, hematin, heme, protoheme |
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| haemagglutination | (noun) agglutination of red blood cells | Synonyms: hemagglutination |
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