| abdomen | (noun) the region of the body of a vertebrate between the thorax and the pelvis | Synonyms: belly, stomach, venter |
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| (noun) the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm | Synonyms: abdominal cavity |
| acetaminophen | (noun) an analgesic for mild pain but not for inflammation; also used as an antipyretic; (Datril, Tylenol, Panadol, Phenaphen, Tempra, and Anacin III are trademarks of brands of acetaminophen tablets) | Synonyms: Anacin III, Datril, Panadol, Phenaphen, Tempra, Tylenol |
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| acrogen | (noun) any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem | - |
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| acumen | (noun) shrewdness shown by keen insight | Synonyms: insightfulness |
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| (noun) a tapering point | - |
| agglutinogen | (noun) any substance that acts as an antigen to cause agglutinin production | - |
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| agnomen | (noun) an additional name or an epithet appended to a name (as in `Ferdinand the Great') | - |
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| albumen | (noun) the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water | Synonyms: egg white, ovalbumin, white |
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| (noun) a simple water-soluble protein found in many animal tissues and liquids | Synonyms: albumin |
| alien | (noun) a person who comes from a foreign country; someone who does not owe allegiance to your country | Synonyms: foreigner, noncitizen, outlander |
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| (noun) anyone who does not belong in the environment in which they are found | Synonyms: stranger, unknown |
| (noun) a form of life assumed to exist outside the Earth or its atmosphere | Synonyms: extraterrestrial, extraterrestrial being |
| allergen | (noun) any substance that can cause an allergy | - |
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| androgen | (noun) male sex hormone that is produced in the testes and responsible for typical male sexual characteristics | Synonyms: androgenic hormone |
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| antigen | (noun) any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies) | - |
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| ascolichen | (noun) a lichen in which the fungus component is an ascomycete | - |
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| aspen | (noun) any of several trees of the genus Populus having leaves on flattened stalks so that they flutter in the lightest wind | - |
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| baleen | (noun) a horny material from the upper jaws of certain whales; used as the ribs of fans or as stays in corsets | Synonyms: whalebone |
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| ballpen | (noun) a pen that has a small metal ball as the point of transfer of ink to paper | Synonyms: ballpoint, ballpoint pen, Biro |
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| barren | (noun) an uninhabited wilderness that is worthless for cultivation | Synonyms: waste, wasteland |
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| basidiolichen | (noun) a lichen in which the fungus component is a basidiomycete | - |
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| batten | (noun) a strip fixed to something to hold it firm | - |
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| (noun) stuffing made of rolls or sheets of cotton wool or synthetic fiber | Synonyms: batting |
| ben | (noun) a mountain or tall hill | - |
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| bitumen | (noun) any of various naturally occurring impure mixtures of hydrocarbons | - |
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| bracken | (noun) large coarse fern often several feet high; essentially weed ferns; cosmopolitan | Synonyms: brake, pasture brake, Pteridium aquilinum |
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| (noun) fern of southeastern Asia; not hardy in cold temperate regions | Synonyms: Pteridium esculentum |
| brethren | (noun) (plural) the lay members of a male religious order | - |
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| bullpen | (noun) a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily | Synonyms: detention cell, detention centre |
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| (noun) a place on a baseball field where relief pitchers can warm up during a game | - |
| bunsen | (noun) a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air | Synonyms: bunsen burner, etna |
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| burden | (noun) weight to be borne or conveyed | Synonyms: load, loading |
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| (noun) the central idea that is expanded in a document or discourse | - |
| (noun) an onerous or difficult concern | Synonyms: encumbrance, incumbrance, load, onus |
| (noun) the central meaning or theme of a speech or literary work | Synonyms: core, effect, essence, gist |
| burthen | (noun) a variant of `burden' | - |
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| businessmen | (noun) the body of individuals who manage businesses | Synonyms: business community |
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| canteen | (noun) a flask for carrying water; used by soldiers or travelers | - |
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| (noun) restaurant in a factory; where workers can eat | - |
| (noun) a recreation room in an institution | - |
| (noun) a restaurant outside; often for soldiers or policemen | Synonyms: mobile canteen |
| (noun) sells food and personal items to personnel at an institution or school or camp etc. | - |
| carageen | (noun) dark purple edible seaweed of the Atlantic coasts of Europe and North America | Synonyms: carrageen, carragheen, Chondrus crispus, Irish moss |
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| carcinogen | (noun) any substance that produces cancer | - |
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| careen | (noun) pitching dangerously to one side | Synonyms: rock, sway, tilt |
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| carrageen | (noun) dark purple edible seaweed of the Atlantic coasts of Europe and North America | Synonyms: carageen, carragheen, Chondrus crispus, Irish moss |
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| carragheen | (noun) dark purple edible seaweed of the Atlantic coasts of Europe and North America | Synonyms: carageen, carrageen, Chondrus crispus, Irish moss |
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| catechumen | (noun) a new convert being taught the principles of Christianity by a catechist | Synonyms: neophyte |
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| cerumen | (noun) a soft yellow wax secreted by glands in the ear canal | Synonyms: earwax |
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| chicken | (noun) a domestic fowl bred for flesh or eggs; believed to have been developed from the red jungle fowl | Synonyms: Gallus gallus |
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| (noun) a foolhardy competition; a dangerous activity that is continued until one competitor becomes afraid and stops | - |
| (noun) the flesh of a chicken used for food | Synonyms: poulet, volaille |
| (noun) a person who lacks confidence, is irresolute and wishy-washy | Synonyms: crybaby, wimp |
| chosen | (noun) an exclusive group of people | Synonyms: elect |
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| (noun) one who is the object of choice; who is given preference | - |
| chromogen | (noun) a compound that can be converted to a pigment | - |
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| churchwarden | (noun) an officer in the Episcopal church who helps a parish priest with secular matters | - |
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| citizen | (noun) a native or naturalized member of a state or other political community | - |
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| cognomen | (noun) the name used to identify the members of a family (as distinguished from each member's given name) | Synonyms: family name, last name, surname |
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| (noun) a familiar name for a person (often a shortened version of a person's given name) | Synonyms: byname, moniker, nickname, sobriquet, soubriquet |
| collagen | (noun) a fibrous scleroprotein in bone and cartilage and tendon and other connective tissue; yields gelatin on boiling | - |
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| colleen | (noun) an Irish girl | - |
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| comedogen | (noun) A substance that tends to produce acne, such as by clogging pores on the skin. | Synonyms: comedogenic, comedogenic substance |
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| coven | (noun) an assembly of witches; usually 13 witches | - |
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| craven | (noun) an abject coward | Synonyms: poltroon, recreant |
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| cryogen | (noun) a liquid that boils at below -160 C and is used as a refrigerant | - |
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| crystallogen | (noun) any chemical element that belongs to the carbon group. | Synonyms: carbon group element, Group 14 element, tetragen, tetrel |
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| cyanogen | (noun) a colorless toxic gas with a pungent almond odor; has been used in chemical warfare | - |
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| cyclamen | (noun) Mediterranean plant widely cultivated as a houseplant for its showy dark green leaves splotched with silver and nodding white or pink to reddish flowers with reflexed petals | Synonyms: Cyclamen purpurascens |
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| dasheen | (noun) tropical starchy tuberous root | Synonyms: cocoyam, edda, taro, taro root |
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| (noun) herb of the Pacific islands grown throughout the tropics for its edible root and in temperate areas as an ornamental for its large glossy leaves | Synonyms: Colocasia esculenta, dalo, taro, taro plant |
| (noun) edible starchy tuberous root of taro plants | Synonyms: cocoyam, eddo, taro |
| delicatessen | (noun) a shop selling ready-to-eat food products | Synonyms: deli, food shop |
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| (noun) ready-to-eat food products | Synonyms: delicatessen food |
| den | (noun) a room that is comfortable and secluded | - |
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| (noun) a unit of 8 to 10 cub scouts | - |
| (noun) the habitation of wild animals | Synonyms: lair |
| (noun) a hiding place; usually a remote place used by outlaws | Synonyms: hideaway, hideout |
| denizen | (noun) a plant or animal naturalized in a region | - |
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| (noun) a person who inhabits a particular place | Synonyms: dweller, habitant, indweller, inhabitant |
| dolmen | (noun) a prehistoric megalithic tomb typically having two large upright stones and a capstone | Synonyms: cromlech, portal tomb |
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| doyen | (noun) a man who is the senior member of a group | Synonyms: dean |
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| dozen | (noun) the cardinal number that is the sum of eleven and one | Synonyms: 12, twelve, XII |
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| drusen | (noun) (plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina | - |
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| dudeen | (noun) a clay pipe with a short stem | - |
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| duramen | (noun) the older inactive central wood of a tree or woody plant; usually darker and denser than the surrounding sapwood | Synonyms: heartwood |
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| eighteen | (noun) the cardinal number that is the sum of seventeen and one | Synonyms: 18, XVIII |
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| eleven | (noun) a team that plays football | Synonyms: football team |
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| (noun) the cardinal number that is the sum of ten and one | Synonyms: 11, XI |
| en | (noun) half the width of an em | Synonyms: nut |
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| endogen | (noun) a monocotyledonous flowering plant; the stem grows by deposits on its inside | Synonyms: liliopsid, monocot, monocotyledon |
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| estrogen | (noun) a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics | Synonyms: oestrogen |
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| even | (noun) the latter part of the day (the period of decreasing daylight from late afternoon until nightfall) | Synonyms: eve, evening, eventide |
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| evergreen | (noun) a plant having foliage that persists and remains green throughout the year | Synonyms: evergreen plant |
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| examen | (noun) a detailed inspection of your conscience (as done daily by Jesuits) | Synonyms: examination |
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| (noun) a critical study (as of a writer's work) | - |
| exogen | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicot, dicotyledon, magnoliopsid |
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| fedayeen | (noun) (plural) Arab guerrillas who operate mainly against Israel | - |
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| fen | (noun) low-lying wet land with grassy vegetation; usually is a transition zone between land and water | Synonyms: fenland, marsh, marshland |
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| (noun) 100 fen equal 1 yuan in China | - |
| fenoprofen | (noun) a nonsteroidal anti-inflammatory drug (trade name Nalfon) used in the treatment of arthritis and other painful inflammatory disorders | Synonyms: fenoprofen calcium, Nalfon |
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| fibrinogen | (noun) a protein present in blood plasma; converts to fibrin when blood clots | Synonyms: factor I |
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| fifteen | (noun) the cardinal number that is the sum of fourteen and one | Synonyms: 15, XV |
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| flamen | (noun) a priest who served a particular deity in ancient Rome | - |
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| flurbiprofen | (noun) a nonsteroidal anti-inflammatory drug (trade name Ansaid) that is administered only orally | Synonyms: Ansaid |
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| foramen | (noun) a natural opening or perforation through a bone or a membranous structure | Synonyms: hiatus |
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| foretoken | (noun) an event that is experienced as indicating important things to come | Synonyms: augury, preindication, sign |
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| fourteen | (noun) the cardinal number that is the sum of thirteen and one | Synonyms: 14, XIV |
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| garden | (noun) a plot of ground where plants are cultivated | - |
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| (noun) a yard or lawn adjoining a house | - |
| (noun) the flowers or vegetables or fruits or herbs that are cultivated in a garden | - |
| gen | (noun) informal term for information | - |
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| given | (noun) an assumption that is taken for granted | Synonyms: precondition, presumption |
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| glen | (noun) a narrow secluded valley (in the mountains) | - |
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| glisten | (noun) the quality of shining with a bright reflected light | Synonyms: glister, glitter, scintillation, sparkle |
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| gluten | (noun) a protein substance that remains when starch is removed from cereal grains; gives cohesiveness to dough | - |
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| glycogen | (noun) one form in which body fuel is stored; stored primarily in the liver and broken down into glucose when needed by the body | Synonyms: animal starch |
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| goitrogen | (noun) any substance (such as thiouracil) that induces the formation of a goiter | - |
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| grayhen | (noun) female black grouse | Synonyms: gray hen, grey hen, greyhen, heath hen |
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| green | (noun) street names for ketamine | Synonyms: cat valium, honey oil, jet, K, special K, super acid, super C |
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| (noun) green color or pigment; resembling the color of growing grass | Synonyms: greenness, viridity |
| (noun) any of various leafy plants or their leaves and stems eaten as vegetables | Synonyms: greens, leafy vegetable |
| (noun) an area of closely cropped grass surrounding the hole on a golf course | Synonyms: putting green, putting surface |
| (noun) a piece of open land for recreational use in an urban area | Synonyms: common, commons, park |
| greisen | (noun) a granitic rock composed of quartz and mica | - |
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| greyhen | (noun) female black grouse | Synonyms: gray hen, grayhen, grey hen, heath hen |
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| groschen | (noun) 100 groschen equal 1 schilling in Austria | - |
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| gulden | (noun) formerly the basic unit of money in the Netherlands; equal to 100 cents | Synonyms: Dutch florin, florin, guilder |
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| (noun) the basic unit of money in Suriname; equal to 100 cents | Synonyms: florin, guilder |
| hallucinogen | (noun) a psychoactive drug that induces hallucinations or altered sensory experiences | Synonyms: hallucinogenic drug, psychedelic drug, psychodelic drug |
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| halogen | (noun) any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions | - |
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| handmaiden | (noun) a personal maid or female attendant | Synonyms: handmaid |
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| (noun) in a subordinate position | Synonyms: handmaid, servant |
| hausen | (noun) valuable source of caviar and isinglass; found in Black and Caspian seas | Synonyms: Acipenser huso, beluga, white sturgeon |
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| haven | (noun) a shelter serving as a place of safety or sanctuary | Synonyms: oasis |
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| (noun) a sheltered port where ships can take on or discharge cargo | Synonyms: harbor, harbour, seaport |
| heathen | (noun) a person who does not acknowledge your god | Synonyms: gentile, infidel, pagan |
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| heaven | (noun) any place of complete bliss and delight and peace | Synonyms: Eden, nirvana, paradise, promised land, Shangri-la |
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