| abecedarian | (noun) a novice learning the rudiments of some subject | - |
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| abecedarius | (noun) a poem having lines beginning with letters of the alphabet in regular order | - |
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| absentmindedness | (noun) preoccupation so great that the ordinary demands on attention are ignored | - |
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| abstractedness | (noun) preoccupation with something to the exclusion of all else | Synonyms: abstraction |
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| accreditation | (noun) the act of granting credit or recognition (especially with respect to an educational institution that maintains suitable standards) | - |
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| accused | (noun) a defendant in a criminal proceeding | - |
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| acedia | (noun) apathy and inactivity in the practice of virtue (personified as one of the deadly sins) | Synonyms: laziness, sloth |
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| acknowledgement | (noun) a statement acknowledging something or someone | Synonyms: acknowledgment |
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| (noun) the state or quality of being recognized or acknowledged | Synonyms: acknowledgment, recognition |
| acknowledgment | (noun) a statement acknowledging something or someone | Synonyms: acknowledgement |
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| (noun) a short note recognizing a source of information or of a quoted passage | Synonyms: citation, cite, credit, mention, quotation, reference |
| (noun) the state or quality of being recognized or acknowledged | Synonyms: acknowledgement, recognition |
| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| affectedness | (noun) a deliberate pretense or exaggerated display | Synonyms: affectation, mannerism, pose |
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| (noun) the quality of being false or artificial (as to impress others) | - |
| aged | (noun) people who are old collectively | Synonyms: elderly |
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| agedness | (noun) the property characteristic of old age | Synonyms: senescence |
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| agueweed | (noun) gentian of eastern North America having clusters of bristly blue flowers | Synonyms: ague weed, five-flowered gentian, Gentiana quinquefolia, Gentianella quinquefolia, stiff gentian |
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| (noun) perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicine | Synonyms: boneset, Eupatorium perfoliatum, thoroughwort |
| airspeed | (noun) the speed of an aircraft relative to the air in which it is flying | - |
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| albedo | (noun) the ratio of reflected to incident light | Synonyms: reflective power |
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| andromeda | (noun) any of several shrubs of the genus Andromeda having leathery leaves and clusters of small flowers | - |
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| (noun) broad-leaved evergreen Asiatic shrub with glossy leaves and drooping clusters of white flowers | Synonyms: Japanese andromeda, lily-of-the-valley tree, Pieris japonica |
| angioedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: atrophedema, giant hives, periodic edema, Quincke's edema |
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| angledozer | (noun) a bulldozer with an angled moldboard to push earth to one side | - |
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| anhedonia | (noun) an inability to experience pleasure | - |
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| aniseed | (noun) liquorice-flavored seeds, used medicinally and in cooking and liquors | Synonyms: anise, anise seed |
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| antecedence | (noun) preceding in time | Synonyms: antecedency, anteriority, precedence, precedency, priority |
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| antecedency | (noun) preceding in time | Synonyms: antecedence, anteriority, precedence, precedency, priority |
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| antecedent | (noun) the referent of an anaphor; a phrase or clause that is referred to by an anaphoric pronoun | - |
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| (noun) a preceding occurrence or cause or event | - |
| (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, ascendant, ascendent, root |
| (noun) anything that precedes something similar in time | Synonyms: forerunner |
| antediluvian | (noun) a very old person | Synonyms: ancient |
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| (noun) any of the early patriarchs who lived prior to the Noachian deluge | Synonyms: antediluvian patriarch |
| antiquatedness | (noun) The state or quality of being outmoded or discredited by reason of age, of being out of style or fashion. | - |
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| antiredeposition | (noun) the process of preventing redeposition | - |
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| aqueduct | (noun) a conduit that resembles a bridge but carries water over a valley | - |
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| arrivederci | (noun) a farewell remark | Synonyms: adieu, adios, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, goodbye, sayonara, so long |
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| assuredness | (noun) great coolness and composure under strain | Synonyms: aplomb, cool, poise, sang-froid |
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| atrophedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: angioedema, giant hives, periodic edema, Quincke's edema |
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| axseed | (noun) European herb resembling vetch; naturalized in the eastern United States; having umbels of pink-and-white flowers and sharp-angled pods | Synonyms: Coronilla varia, crown vetch |
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| azedarach | (noun) tree of northern India and China having purple blossoms and small inedible yellow fruits; naturalized in the southern United States as a shade tree | Synonyms: azederach, China tree, chinaberry, chinaberry tree, Melia azedarach, Melia azederach, Persian lilac, pride-of-India |
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| azederach | (noun) tree of northern India and China having purple blossoms and small inedible yellow fruits; naturalized in the southern United States as a shade tree | Synonyms: azedarach, China tree, chinaberry, chinaberry tree, Melia azedarach, Melia azederach, Persian lilac, pride-of-India |
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| baedeker | (noun) any of a series of travel guidebooks published by the German firm founded by Karl Baedeker | - |
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| baffled | (noun) people who are frustrated and perplexed | - |
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| battledore | (noun) an ancient racket game | Synonyms: battledore and shuttlecock |
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| (noun) a light long-handled racket used by badminton players | Synonyms: badminton racket, badminton racquet |
| beardedness | (noun) The quality of having a beard. | - |
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| bed | (noun) a piece of furniture that provides a place to sleep | - |
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| (noun) a plot of ground in which plants are growing | - |
| (noun) a foundation of earth or rock supporting a road or railroad track | - |
| (noun) the flat surface of a printing press on which the type form is laid in the last stage of producing a newspaper or magazine or book etc. | - |
| (noun) single thickness of usually some homogeneous substance | Synonyms: layer |
| (noun) a stratum of ore or coal thick enough to be mined with profit | Synonyms: seam |
| (noun) a depression forming the ground under a body of water | Synonyms: bottom |
| (noun) (geology) a stratum of rock (especially sedimentary rock) | - |
| bedbug | (noun) bug of temperate regions that infests especially beds and feeds on human blood | Synonyms: bed bug, chinch, Cimex lectularius |
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| bedchamber | (noun) a room used primarily for sleeping | Synonyms: bedroom, chamber, sleeping accommodation, sleeping room |
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| bedclothes | (noun) coverings that are used on a bed | Synonyms: bed clothing, bedding |
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| bedcover | (noun) decorative cover for a bed | Synonyms: bed cover, bed covering, bedspread, counterpane, spread |
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| bedder | (noun) an ornamental plant suitable for planting in a flowerbed | Synonyms: bedding plant |
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| bedding | (noun) coverings that are used on a bed | Synonyms: bed clothing, bedclothes |
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| (noun) material used to provide a bed for animals | Synonyms: bedding material, litter |
| bedesman | (noun) a person who is paid to pray for the soul of another | Synonyms: beadsman |
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| bedevilment | (noun) the act of harassing someone | Synonyms: badgering, torment, worrying |
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| bedfellow | (noun) a person with whom you share a bed | Synonyms: bedmate |
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| (noun) a temporary associate | - |
| bedframe | (noun) the framework of a bed | Synonyms: bedstead |
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| bedground | (noun) an area on which a drove of cattle or sheep can sleep for a night | Synonyms: bed-ground, bed ground |
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| bedlam | (noun) a state of extreme confusion and disorder | Synonyms: chaos, pandemonium, topsy-turvydom, topsy-turvyness |
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| bedlamite | (noun) an archaic term for a lunatic | - |
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| bedmate | (noun) a person with whom you share a bed | Synonyms: bedfellow |
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| bedpan | (noun) a shallow vessel used by a bedridden patient for defecation and urination | - |
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| bedpost | (noun) any of 4 vertical supports at the corners of a bedstead | - |
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| bedrest | (noun) confinement to bed continuously (as in the case of some sick or injured persons) | Synonyms: bed rest |
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| bedrock | (noun) principles from which other truths can be derived | Synonyms: basic principle, basics, fundamental principle, fundamentals |
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| (noun) solid unweathered rock lying beneath surface deposits of soil | - |
| bedroll | (noun) bedding rolled up for carrying | - |
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| bedroom | (noun) a room used primarily for sleeping | Synonyms: bedchamber, chamber, sleeping accommodation, sleeping room |
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| bedside | (noun) space by the side of a bed (especially the bed of a sick or dying person) | - |
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| bedsit | (noun) a furnished sitting room with sleeping accommodations (and some plumbing) | Synonyms: bedsitter, bedsitting room |
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| bedsitter | (noun) a furnished sitting room with sleeping accommodations (and some plumbing) | Synonyms: bedsit, bedsitting room |
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| bedsore | (noun) a chronic ulcer of the skin caused by prolonged pressure on it (as in bedridden patients) | Synonyms: decubitus ulcer, pressure sore |
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| bedspread | (noun) decorative cover for a bed | Synonyms: bed cover, bed covering, bedcover, counterpane, spread |
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| bedspring | (noun) (usually in the plural) one of the springs holding up the mattress of a bed | - |
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| bedstead | (noun) the framework of a bed | Synonyms: bedframe |
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| bedstraw | (noun) any of several plants of the genus Galium | - |
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| bedtime | (noun) the time you go to bed | - |
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| bedwetter | (noun) someone suffering from enuresis; someone who urinates while asleep in bed | Synonyms: bed wetter, wetter |
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| beetleweed | (noun) tufted evergreen perennial herb having spikes of tiny white flowers and glossy green round to heart-shaped leaves that become coppery to maroon or purplish in fall | Synonyms: coltsfoot, galax, Galax urceolata, galaxy, wandflower |
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| beggarweed | (noun) West Indian forage plant cultivated in southern United States as forage and to improve soil | Synonyms: Desmodium purpureum, Desmodium tortuosum |
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| beloved | (noun) a beloved person; used as terms of endearment | Synonyms: baby, darling, dear, dearest, dearie, deary, honey, love, sweetheart, sweetie |
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| belvedere | (noun) a gazebo sited to command a fine view | - |
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| (noun) densely branched Eurasian plant; foliage turns purple-red in autumn | Synonyms: Bassia scoparia, burning bush, fire-bush, fire bush, Kochia scoparia, summer cypress |
| benedick | (noun) a newly married man (especially one who has long been a bachelor) | Synonyms: benedict |
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| benedict | (noun) a newly married man (especially one who has long been a bachelor) | Synonyms: benedick |
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| benedictine | (noun) a French liqueur originally made by Benedictine monks | - |
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| benediction | (noun) the act of praying for divine protection | Synonyms: blessing |
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| (noun) a ceremonial prayer invoking divine protection | Synonyms: blessing |
| benniseed | (noun) small oval seeds of the sesame plant | Synonyms: sesame seed |
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| benweed | (noun) widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity | Synonyms: ragweed, ragwort, Senecio jacobaea, tansy ragwort |
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| bereaved | (noun) a person who has suffered the death of someone they loved | Synonyms: bereaved person |
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| betrothed | (noun) the person to whom you are engaged | - |
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| bigheartedness | (noun) the quality of being kind and generous | - |
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| bilsted | (noun) a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap | Synonyms: American sweet gum, Liquidambar styraciflua, red gum, sweet gum, sweet gum tree |
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| bindweed | (noun) any of several vines of the genera Convolvulus and Calystegia having a twining habit | - |
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| biofeedback | (noun) a training program in which a person is given information about physiological processes (heart rate or blood pressure) that is not normally available with the goal of gaining conscious control of them | - |
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| biomedicine | (noun) the branch of medical science that studies the ability of organisms to withstand environmental stress (as in space travel) | - |
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| (noun) the branch of medical science that applies biological and physiological principles to clinical practice | - |
| bioremediation | (noun) the act of treating waste or pollutants by the use of microorganisms (as bacteria) that can break down the undesirable substances | - |
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| (noun) the branch of biotechnology that uses biological process to overcome environmental problems | - |
| biped | (noun) an animal with two feet | - |
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| bipedalism | (noun) the bodily attribute of being bipedal; having two feet | - |
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| birdfeeder | (noun) an outdoor device that supplies food for wild birds | Synonyms: bird feeder, feeder |
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| birdseed | (noun) food given to birds; usually mixed seeds | Synonyms: bird feed, bird food |
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| bitterweed | (noun) any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma | Synonyms: ambrosia, ragweed |
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| (noun) widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States | Synonyms: bristly oxtongue, bugloss, oxtongue, Picris echioides |
| blackseed | (noun) grass native to West Indies but common in southern United States having tufted wiry stems often infested with a dark fungus | Synonyms: carpet grass, smut grass, Sporobolus poiretii |
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| bleeder | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: haemophile, haemophiliac, hemophile, hemophiliac |
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| bleeding | (noun) the flow of blood from a ruptured blood vessel | Synonyms: haemorrhage, hemorrhage |
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| blessedness | (noun) a state of supreme happiness | Synonyms: beatification, beatitude |
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| bloodshed | (noun) indiscriminate slaughter | Synonyms: battue, bloodbath, bloodletting |
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| (noun) the shedding of blood resulting in murder | Synonyms: gore |
| blueweed | (noun) a coarse prickly European weed with spikes of blue flowers; naturalized in United States | Synonyms: blue devil, blue thistle, Echium vulgare, viper's bugloss |
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| bobsled | (noun) a long racing sled (for 2 or more people) with a steering mechanism | Synonyms: bob, bobsleigh |
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| (noun) formerly two short sleds coupled together | Synonyms: bobsleigh |
| bobsledding | (noun) riding on a bobsled | - |
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