| aba | (noun) a fabric woven from goat hair and camel hair | - |
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| (noun) a loose sleeveless outer garment made from aba cloth; worn by Arabs | - |
| 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 |
| abacus | (noun) a calculator that performs arithmetic functions by manually sliding counters on rods or in grooves | - |
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| (noun) a tablet placed horizontally on top of the capital of a column as an aid in supporting the architrave | - |
| abalone | (noun) any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior | Synonyms: ear-shell |
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| abamp | (noun) a unit of current equal to 10 amperes | Synonyms: abampere |
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| abampere | (noun) a unit of current equal to 10 amperes | Synonyms: abamp |
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| abandon | (noun) the trait of lacking restraint or control; reckless freedom from inhibition or worry | Synonyms: unconstraint, wantonness |
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| (noun) a feeling of extreme emotional intensity | Synonyms: wildness |
| abandonment | (noun) withdrawing support or help despite allegiance or responsibility | Synonyms: defection, desertion |
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| (noun) the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away | - |
| (noun) the act of giving something up | Synonyms: desertion, forsaking |
| abarticulation | (noun) dislocation of a joint | - |
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| abasement | (noun) depriving one of self-esteem | Synonyms: humiliation |
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| (noun) a low or downcast state | Synonyms: abjection, degradation |
| abashment | (noun) feeling embarrassed due to modesty | Synonyms: bashfulness |
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| abasia | (noun) inability to walk | - |
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| abatement | (noun) the act of abating | - |
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| (noun) an interruption in the intensity or amount of something | Synonyms: hiatus, reprieve, respite, suspension |
| abatis | (noun) a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy | Synonyms: abattis |
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| abator | (noun) a person who abates a nuisance | - |
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| abattis | (noun) a line of defense consisting of a barrier of felled or live trees with branches (sharpened or with barbed wire entwined) pointed toward the enemy | Synonyms: abatis |
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| abattoir | (noun) a building where animals are butchered | Synonyms: butchery, shambles, slaughterhouse |
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| abaya | (noun) (Arabic) a loose black robe from head to toe; traditionally worn by Muslim women | - |
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| abbacy | (noun) the jurisdiction or office of an abbot | - |
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| absorbance | (noun) (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation | Synonyms: optical density, photographic density, transmission density |
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| absorbate | (noun) a material that has been or is capable of being absorbed | - |
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| acrobat | (noun) an athlete who performs acts requiring skill and agility and coordination | - |
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| acrobatics | (noun) the gymnastic moves of an acrobat | Synonyms: tumbling |
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| (noun) the performance of stunts while in flight in an aircraft | Synonyms: aerobatics, stunt flying, stunting |
| adiabaticity | (noun) The condition of occurring without gain or loss of heat (and thus with no change in entropy, in the quasistatic approximation). | - |
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| adsorbate | (noun) a material that has been or is capable of being adsorbed | - |
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| aerobatics | (noun) the performance of stunts while in flight in an aircraft | Synonyms: acrobatics, stunt flying, stunting |
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| alabaster | (noun) a very light white | - |
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| (noun) a compact fine-textured, usually white gypsum used for carving | - |
| (noun) a hard compact kind of calcite | Synonyms: Mexican onyx, onyx marble, oriental alabaster |
| albacore | (noun) large pelagic tuna the source of most canned tuna; reaches 93 pounds and has long pectoral fins; found worldwide in tropical and temperate waters | Synonyms: long-fin tunny, Thunnus alalunga |
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| (noun) relatively small tuna with choice white flesh; major source of canned tuna | - |
| albatross | (noun) large web-footed birds of the Southern Hemisphere having long narrow wings; noted for powerful gliding flight | Synonyms: mollymawk |
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| (noun) (figurative) something that hinders or handicaps | Synonyms: millstone |
| algarroba | (noun) evergreen Mediterranean tree with edible pods; the biblical carob | Synonyms: carob, carob bean tree, carob tree, Ceratonia siliqua |
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| (noun) mesquite of Gulf Coast and Caribbean Islands from Mexico to Venezuela | Synonyms: Prosopis juliflora, Prosopis juliiflora |
| (noun) long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute | Synonyms: algarroba bean, carob, carob bean, locust bean, locust pod |
| (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarrobilla |
| ambage | (noun) a style that involves indirect ways of expressing things | Synonyms: circumlocution, periphrasis |
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| ambages | (noun) (archaic) roundabout or mysterious ways of action | - |
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| ambassador | (noun) a diplomat of the highest rank; accredited as representative from one country to another | Synonyms: embassador |
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| (noun) an informal representative | - |
| ambassadorship | (noun) the post of ambassador | - |
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| ambassadress | (noun) a woman ambassador | - |
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| ameba | (noun) naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion | Synonyms: amoeba |
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| amobarbital | (noun) a barbiturate with sedative and hypnotic effects; used to relieve insomnia and as an anticonvulsant | - |
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| amoeba | (noun) naked freshwater or marine or parasitic protozoa that form temporary pseudopods for feeding and locomotion | Synonyms: ameba |
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| amphisbaena | (noun) (classical mythology) a serpent with a head at each end of its body | - |
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| antibacterial | (noun) any drug that destroys bacteria or inhibits their growth | Synonyms: antibacterial drug, bactericide |
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| antibaryon | (noun) the antiparticle of a baryon; a hadron with a baryon number of -1 | - |
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| approbation | (noun) official recognition or approval | - |
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| (noun) official approval | - |
| arariba | (noun) Brazilian tree with handsomely marked wood | Synonyms: Centrolobium robustum |
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| araroba | (noun) a bitter yellow powder used to treat skin diseases | Synonyms: chrysarobin, Goa powder |
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| arbalest | (noun) late version of the crossbow with a steel bow | Synonyms: arbalist |
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| arbalist | (noun) late version of the crossbow with a steel bow | Synonyms: arbalest |
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| (noun) archer who uses an arbalest | - |
| archaebacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacterium, archaeobacteria, archeobacteria |
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| archaebacterium | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaeobacteria, archeobacteria |
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| archaeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archeobacteria |
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| archeobacteria | (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae | Synonyms: archaebacteria, archaebacterium, archaeobacteria |
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| armband | (noun) a band worn around the upper arm | - |
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| (noun) worn around arm as identification or to indicate mourning | - |
| arroba | (noun) a unit of weight used in some Spanish speaking countries | - |
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| (noun) a liquid measure (with different values) used in some Spanish speaking countries | - |
| asarabacca | (noun) thick creeping evergreen herb of western Europe | Synonyms: Asarum europaeum |
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| autobahn | (noun) an expressway in a German-speaking country | - |
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| baa | (noun) the cry made by sheep | - |
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| baas | (noun) South African term for `boss' | - |
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| baba | (noun) a small cake leavened with yeast | - |
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| babassu | (noun) tall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivory | Synonyms: babassu palm, coco de macao, Orbignya martiana, Orbignya phalerata, Orbignya spesiosa |
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| babbitt | (noun) an alloy of tin with some copper and antimony; a lining for bearings that reduces friction | Synonyms: Babbitt metal |
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| babbitting | (noun) lining a surface or bearing with Babbitt metal | - |
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| babble | (noun) gibberish resembling the sounds of a baby | Synonyms: babbling, lallation |
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| babbler | (noun) any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae | Synonyms: cackler |
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| (noun) an obnoxious and foolish and loquacious talker | Synonyms: chatterbox, chatterer, magpie, prater, spouter |
| babbling | (noun) gibberish resembling the sounds of a baby | Synonyms: babble, lallation |
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| babe | (noun) a very young child (birth to 1 year) who has not yet begun to walk or talk | Synonyms: baby, infant |
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| babel | (noun) a confusion of voices and other sounds | - |
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| babiroussa | (noun) Indonesian wild pig with enormous curved canine teeth | Synonyms: babirusa, babirussa, Babyrousa Babyrussa |
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| babirusa | (noun) Indonesian wild pig with enormous curved canine teeth | Synonyms: babiroussa, babirussa, Babyrousa Babyrussa |
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| babirussa | (noun) Indonesian wild pig with enormous curved canine teeth | Synonyms: babiroussa, babirusa, Babyrousa Babyrussa |
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| babka | (noun) a coffee cake flavored with orange rind and raisins and almonds | - |
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| baboo | (noun) used as a Hindi courtesy title; equivalent to English `Mr' | Synonyms: babu |
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| baboon | (noun) large terrestrial monkeys having doglike muzzles | - |
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| babu | (noun) used as a Hindi courtesy title; equivalent to English `Mr' | Synonyms: baboo |
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| babushka | (noun) a woman's headscarf folded into a triangle and tied under the chin; worn by Russian peasant women | - |
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| baby | (noun) a project of personal concern to someone | - |
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| (noun) a very young mammal | - |
| (noun) a very young child (birth to 1 year) who has not yet begun to walk or talk | Synonyms: babe, infant |
| (noun) the youngest member of a group (not necessarily young) | - |
| (noun) an immature childish person | Synonyms: child |
| (noun) an unborn child; a human fetus | - |
| (noun) a beloved person; used as terms of endearment | Synonyms: beloved, darling, dear, dearest, dearie, deary, honey, love, sweetheart, sweetie |
| babygram | (noun) an X-ray of the entire body of an infant. | - |
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| babyhood | (noun) the earliest state of immaturity | Synonyms: infancy |
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| (noun) the early stage of growth or development | Synonyms: early childhood, infancy |
| babyminder | (noun) a person who looks after babies (usually in the person's own home) while the babys' parents are working | Synonyms: baby minder, minder |
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| babysitter | (noun) a person engaged to care for children when the parents are not home | Synonyms: baby-sitter, sitter |
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| babysitting | (noun) the work of a baby sitter; caring for children when their parents are not home | Synonyms: baby sitting |
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| babytalk | (noun) the developing speech of a young child | Synonyms: baby talk |
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| (noun) an adult's imitation of the speech of a young child | Synonyms: baby talk, motherese |
| bacca | (noun) an indehiscent fruit derived from a single ovary having one or many seeds within a fleshy wall or pericarp: e.g. grape, tomato, cranberry | Synonyms: simple fruit |
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| baccalaureate | (noun) an academic degree conferred on someone who has successfully completed undergraduate studies | Synonyms: bachelor's degree |
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| (noun) a farewell sermon to a graduating class at their commencement ceremonies | - |
| baccarat | (noun) a card game played in casinos in which two or more punters gamble against the banker; the player wins who holds 2 or 3 cards that total closest to nine | Synonyms: chemin de fer |
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| bacchanal | (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanalia, debauch, debauchery, drunken revelry, orgy, riot, saturnalia |
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| (noun) someone who engages in drinking bouts | Synonyms: bacchant, drunken reveler, drunken reveller |
| (noun) a drunken reveller; a devotee of Bacchus | Synonyms: bacchant |
| bacchanalia | (noun) a wild gathering involving excessive drinking and promiscuity | Synonyms: bacchanal, debauch, debauchery, drunken revelry, orgy, riot, saturnalia |
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| bacchant | (noun) (classical mythology) a priest or votary of Bacchus | - |
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| (noun) a drunken reveller; a devotee of Bacchus | Synonyms: bacchanal |
| (noun) someone who engages in drinking bouts | Synonyms: bacchanal, drunken reveler, drunken reveller |
| bacchante | (noun) (classical mythology) a priestess or votary of Bacchus | - |
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| baccy | (noun) leaves of the tobacco plant dried and prepared for smoking or ingestion | Synonyms: tobacco |
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| bachelor | (noun) a man who has never been married | Synonyms: unmarried man |
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| (noun) a knight of the lowest order; could display only a pennon | Synonyms: bachelor-at-arms, knight bachelor |
| bachelorette | (noun) a young unmarried woman who lives alone | Synonyms: bachelor girl |
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| bachelorhood | (noun) the state of being an unmarried man | - |
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| (noun) the time of a man's life prior to marriage | - |
| bacillus | (noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil | Synonyms: B |
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| bacitracin | (noun) a polypeptide antibiotic of known chemical structure effective against several types of Gram-positive organisms; usually applied locally | - |
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| back | (noun) (American football) the position of a player on a football team who is stationed behind the line of scrimmage | - |
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| (noun) the side that goes last or is not normally seen | Synonyms: rear |
| (noun) a support that you can lean against while sitting | Synonyms: backrest |
| (noun) the part of a garment that covers the back of your body | - |
| (noun) the protective covering on the front, back, and spine of a book | Synonyms: binding, book binding, cover |
| (noun) the posterior part of a human (or animal) body from the neck to the end of the spine | Synonyms: dorsum |
| (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: backbone, rachis, spinal column, spine, vertebral column |
| (noun) the part of something that is furthest from the normal viewer | Synonyms: rear |
| (noun) (football) a person who plays in the backfield | - |
| backache | (noun) an ache localized in the back | - |
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| backband | (noun) a broad band that passes over the back of a horse and supports the shafts of a vehicle | - |
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| backbeat | (noun) a loud steady beat | - |
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| backbench | (noun) any of the seats occupied by backbenchers in the House of Commons | - |
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| backbencher | (noun) a member of the House of Commons who is not a party leader | - |
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| backbend | (noun) an acrobatic feat in which the trunk is bent backward from a standing position until the hands touch the floor | - |
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