| bolster | (noun) a pillow that is often put across a bed underneath the regular pillows | Synonyms: long pillow |
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| bolt | (noun) a sudden abandonment (as from a political party) | - |
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| (noun) the act of moving with great haste | Synonyms: dash |
| (noun) a screw that screws into a nut to form a fastener | - |
| (noun) the part of a lock that is engaged or withdrawn with a key | Synonyms: deadbolt |
| (noun) a sliding bar in a breech-loading firearm that ejects an empty cartridge and replaces it and closes the breech | - |
| (noun) a roll of cloth or wallpaper of a definite length | - |
| (noun) a discharge of lightning accompanied by thunder | Synonyms: bolt of lightning, thunderbolt |
| bolti | (noun) important food fish of the Nile and other rivers of Africa and Asia Minor | Synonyms: Tilapia nilotica |
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| bolus | (noun) a large pill; used especially in veterinary medicine | - |
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| (noun) a small round soft mass (as of chewed food) | - |
| bomb | (noun) an explosive device fused to explode under specific conditions | - |
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| (noun) strong sealed vessel for measuring heat of combustion | Synonyms: bomb calorimeter |
| (noun) an event that fails badly or is totally ineffectual | Synonyms: dud, turkey |
| bombard | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombardon |
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| bombardier | (noun) the member of a bomber crew responsible for using the bombsight and releasing the bombs on the target | - |
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| (noun) a noncommissioned officer in the British artillery | - |
| bombardment | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, battery, shelling |
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| (noun) an attack by dropping bombs | Synonyms: bombing |
| (noun) the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays) | - |
| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: barrage, onslaught, outpouring |
| bombardon | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombard |
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| (noun) a tuba that coils over the shoulder of the musician | Synonyms: helicon |
| bombast | (noun) pompous or pretentious talk or writing | Synonyms: blah, claptrap, fustian, rant |
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| bombazine | (noun) a twilled fabric used for dresses; the warp is silk and the weft is worsted | - |
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| bomber | (noun) a military aircraft that drops bombs during flight | - |
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| (noun) a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States | Synonyms: Cuban sandwich, grinder, hero, hero sandwich, hoagie, hoagy, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep |
| (noun) a person who plants bombs | - |
| bombie | (noun) an unexploded bomblet | - |
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| bombilation | (noun) sound of rapid vibration | Synonyms: bombination, buzz |
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| bombination | (noun) sound of rapid vibration | Synonyms: bombilation, buzz |
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| bombing | (noun) an attack by dropping bombs | Synonyms: bombardment |
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| (noun) the use of bombs for sabotage; a tactic frequently used by terrorists | - |
| bomblet | (noun) one of the smaller bombs that are released from a cluster bomb | Synonyms: cluster bomblet |
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| bombproof | (noun) a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids | Synonyms: air-raid shelter, bomb shelter |
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| bombshell | (noun) an explosive bomb or artillery shell | - |
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| (noun) a shocking surprise | Synonyms: thunderbolt, thunderclap |
| (noun) an entertainer who has a sensational effect | - |
| bombsight | (noun) a sighting device in an aircraft for aiming bombs | - |
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| bombycid | (noun) moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk | Synonyms: bombycid moth, silkworm moth |
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| bonanza | (noun) a sudden happening that brings good fortune (as a sudden opportunity to make money) | Synonyms: boom, bunce, godsend, gold rush, gravy, manna from heaven, windfall |
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| (noun) an especially rich vein of precious ore | - |
| bonavist | (noun) perennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seeds; grown as an ornamental and as a vegetable on the Indian subcontinent; sometimes placed in genus Dolichos | Synonyms: Dolichos lablab, Egyptian bean, hyacinth bean, Indian bean, Lablab purpureus |
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| bonbon | (noun) a candy that usually has a center of fondant or fruit or nuts coated in chocolate | - |
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| bonce | (noun) informal terms for a human head | Synonyms: attic, bean, dome, noggin, noodle |
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| bond | (noun) a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner) | Synonyms: hamper, shackle, trammel |
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| (noun) a connection that fastens things together | Synonyms: attachment |
| (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adherence, adhesion, adhesiveness |
| (noun) an electrical force linking atoms | Synonyms: chemical bond |
| (noun) a certificate of debt (usually interest-bearing or discounted) that is issued by a government or corporation in order to raise money; the issuer is required to pay a fixed sum annually until maturity and then a fixed sum to repay the principal | Synonyms: bond certificate |
| (noun) (criminal law) money that must be forfeited by the bondsman if an accused person fails to appear in court for trial | Synonyms: bail, bail bond |
| (noun) a connection based on kinship or marriage or common interest | Synonyms: alliance |
| (noun) a superior quality of strong durable white writing paper; originally made for printing documents | Synonyms: bond paper |
| bondage | (noun) sexual practice that involves physically restraining (by cords or handcuffs) one of the partners | - |
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| (noun) the state of being under the control of another person | Synonyms: slavery, thraldom, thrall, thralldom |
| (noun) the state of being under the control of a force or influence or abstract power | - |
| bondholder | (noun) a holder of bonds issued by a government or corporation | - |
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| bonding | (noun) fastening firmly together | Synonyms: soldering |
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| (noun) (dentistry) a technique for repairing a tooth; resinous material is applied to the surface of the tooth where it adheres to the tooth's enamel | - |
| (noun) a close personal relationship that forms between people (as between husband and wife or parent and child) | - |
| bondmaid | (noun) a female slave | Synonyms: bondswoman, bondwoman |
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| (noun) a female bound to serve without wages | Synonyms: bondswoman, bondwoman |
| bondman | (noun) a male slave | Synonyms: bondsman |
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| (noun) a male bound to serve without wages | Synonyms: bondsman |
| bondsman | (noun) a male slave | Synonyms: bondman |
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| (noun) a male bound to serve without wages | Synonyms: bondman |
| (noun) a male who signs a bond as surety for someone else | - |
| bondsperson | (noun) someone who signs a bond as surety for someone else | - |
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| bondswoman | (noun) a female slave | Synonyms: bondmaid, bondwoman |
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| (noun) a female bound to serve without wages | Synonyms: bondmaid, bondwoman |
| (noun) a female who signs a bond as surety for someone else | - |
| bonduc | (noun) tropical tree with large prickly pods of seeds that resemble beans and are used for jewelry and rosaries | Synonyms: bonduc tree, Caesalpinia bonduc, Caesalpinia bonducella |
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| (noun) handsome tree of central and eastern North America having large bipinnate leaves and green-white flowers followed by large woody brown pods whose seeds are used as a coffee substitute | Synonyms: chicot, Gymnocladus dioica, Kentucky coffee tree |
| bondwoman | (noun) a female slave | Synonyms: bondmaid, bondswoman |
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| (noun) a female bound to serve without wages | Synonyms: bondmaid, bondswoman |
| bone | (noun) a shade of white the color of bleached bones | Synonyms: ivory, off-white, pearl |
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| (noun) rigid connective tissue that makes up the skeleton of vertebrates | Synonyms: os |
| (noun) the porous calcified substance from which bones are made | Synonyms: osseous tissue |
| bonefish | (noun) slender silvery marine fish found in tropical mud flats and mangrove lagoons | Synonyms: Albula vulpes |
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| bonehead | (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: blockhead, dumbass, dunce, dunderhead, fuckhead, hammerhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead |
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| bonelet | (noun) a small bone; especially one in the middle ear | Synonyms: ossicle, ossiculum |
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| bonemeal | (noun) fertilizer made of ground bones | - |
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| boner | (noun) an embarrassing mistake | Synonyms: bloomer, blooper, blunder, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall |
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| bones | (noun) (used in the plural) a percussion instrument consisting of a pair of hollow pieces of wood or bone (usually held between the thumb and fingers) that are made to click together (as by Spanish dancers) in rhythm with the dance | Synonyms: castanets, clappers, finger cymbals |
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| boneset | (noun) perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicine | Synonyms: agueweed, Eupatorium perfoliatum, thoroughwort |
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| (noun) European herb having small white, pink or purple flowers; naturalized as a weed in North America | Synonyms: common comfrey, Symphytum officinale |
| bonesetter | (noun) someone (not necessarily a licensed physician) who sets broken bones | - |
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| boneshaker | (noun) any wheeled vehicle that is dilapidated and uncomfortable | - |
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| bonfire | (noun) a large outdoor fire that is lighted as a signal or in celebration | Synonyms: balefire |
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| bong | (noun) a dull resonant sound as of a bell | - |
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| bongo | (noun) large forest antelope of central Africa having a reddish-brown coat with white stripes and spiral horns | Synonyms: Boocercus eurycerus, Tragelaphus eurycerus |
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| (noun) a small drum; played with the hands | Synonyms: bongo drum |
| bonheur | (noun) (French) happiness and good humor | - |
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| bonhomie | (noun) a disposition to be friendly and approachable (easy to talk to) | Synonyms: affability, affableness, amiability, amiableness, geniality |
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| boniface | (noun) the owner or manager of an inn | Synonyms: host, innkeeper |
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| boniness | (noun) extreme leanness (usually caused by starvation or disease) | Synonyms: bonyness, emaciation, gauntness, maceration |
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| bonito | (noun) any of various scombroid fishes intermediate in size and characteristics between mackerels and tunas | - |
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| (noun) fish whose flesh is dried and flaked for Japanese cookery; may be same species as skipjack tuna | Synonyms: Katsuwonus pelamis, oceanic bonito |
| (noun) flesh of mostly Pacific food fishes of the genus Sarda of the family Scombridae; related to but smaller than tuna | - |
| bonnet | (noun) a hat tied under the chin | Synonyms: poke bonnet |
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| (noun) protective covering consisting of a metal part that covers the engine | Synonyms: cowl, cowling, hood |
| bonnethead | (noun) small harmless hammerhead having a spade-shaped head; abundant in bays and estuaries | Synonyms: bonnet shark, shovelhead, Sphyrna tiburo |
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| bonobo | (noun) small chimpanzee of swamp forests in Zaire; a threatened species | Synonyms: Pan paniscus, pygmy chimpanzee |
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| bonsai | (noun) a dwarfed ornamental tree or shrub grown in a tray or shallow pot | - |
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| bonus | (noun) anything that tends to arouse | Synonyms: fillip |
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| (noun) an additional payment (or other remuneration) to employees as a means of increasing output | Synonyms: incentive |
| bonxie | (noun) gull-like jaeger of northern seas | Synonyms: skua |
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| bonyness | (noun) extreme leanness (usually caused by starvation or disease) | Synonyms: boniness, emaciation, gauntness, maceration |
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| boo | (noun) a cry or noise made to express displeasure or contempt | Synonyms: bird, Bronx cheer, hiss, hoot, raspberry, razz, razzing, snort |
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| boob | (noun) either of two soft fleshy milk-secreting glandular organs on the chest of a woman | Synonyms: bosom, breast, knocker, tit, titty |
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| (noun) an ignorant or foolish person | Synonyms: booby, dope, dumbbell, dummy, pinhead |
| booboisie | (noun) class consisting of all those who are considered boobs | - |
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| booby | (noun) small tropical gannet having a bright bill or bright feet or both | - |
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| (noun) an ignorant or foolish person | Synonyms: boob, dope, dumbbell, dummy, pinhead |
| boodle | (noun) a gambling card game in which chips are placed on the ace and king and queen and jack of separate suits (taken from a separate deck); a player plays the lowest card of a suit in his hand and successively higher cards are played until the sequence stops; the player who plays a card matching one in the layout wins all the chips on that card | Synonyms: Chicago, Michigan, Newmarket, stops |
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| (noun) informal terms for money | Synonyms: bread, cabbage, clams, dinero, dough, gelt, kale, lettuce, lolly, loot, lucre, moolah, pelf, scratch, shekels, simoleons, sugar, wampum |
| booger | (noun) dried nasal mucus | - |
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| (noun) an imaginary monster used to frighten children | Synonyms: bogeyman, boogeyman, bugaboo, bugbear |
| boogeyman | (noun) an imaginary monster used to frighten children | Synonyms: bogeyman, booger, bugaboo, bugbear |
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| boogie | (noun) an instrumental version of the blues (especially for piano) | Synonyms: boogie-woogie |
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| book | (noun) physical objects consisting of a number of pages bound together | Synonyms: volume |
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| (noun) a number of sheets (ticket or stamps etc.) bound together on one edge | - |
| (noun) a written work or composition that has been published (printed on pages bound together) | - |
| (noun) a written version of a play or other dramatic composition; used in preparing for a performance | Synonyms: playscript, script |
| (noun) a compilation of the known facts regarding something or someone | Synonyms: record, record book |
| (noun) a major division of a long written composition | - |
| (noun) a collection of rules or prescribed standards on the basis of which decisions are made | Synonyms: rule book |
| (noun) a collection of playing cards satisfying the rules of a card game | - |
| (noun) a record in which commercial accounts are recorded | Synonyms: account book, book of account, ledger, leger |
| bookbinder | (noun) a worker whose trade is binding books | - |
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| bookbindery | (noun) a bookbinder's workshop; a place for binding books | - |
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| bookbinding | (noun) the craft of binding books | - |
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| bookcase | (noun) a piece of furniture with shelves for storing books | - |
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| bookcloth | (noun) a woven fabric (usually cotton) used for book covers. | Synonyms: book cloth |
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| bookclub | (noun) a club that people join in order to buy selected books at reduced prices | - |
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| bookdealer | (noun) a dealer in books; a merchant who sells books | Synonyms: book seller |
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| bookend | (noun) a support placed at the end of a row of books to keep them upright (on a shelf or table) | - |
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| booker | (noun) someone who engages a person or company for performances | Synonyms: booking agent |
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| bookfair | (noun) bazaar at which books are sold or auctioned off in order to raise funds for a worthy cause | Synonyms: book fair |
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| (noun) fair organized by publishers or booksellers to promote the sale of books | Synonyms: book fair |
| bookie | (noun) a gambler who accepts and pays off bets (especially on horse races) | Synonyms: bookmaker |
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| booking | (noun) the act of reserving (a place or passage) or engaging the services of (a person or group) | Synonyms: reservation |
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| (noun) employment for performers or performing groups that lasts for a limited period of time | Synonyms: engagement |
| bookishness | (noun) exaggerated studiousness | - |
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| bookkeeper | (noun) someone who records the transactions of a business | - |
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| bookkeeping | (noun) the activity of recording business transactions | Synonyms: clerking |
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| booklet | (noun) a small book usually having a paper cover | Synonyms: brochure, folder, leaflet, pamphlet |
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| booklouse | (noun) minute wingless psocopterous insects injurious to books and papers | Synonyms: book louse, deathwatch, Liposcelis divinatorius |
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| booklover | (noun) someone who loves (and usually collects) books | Synonyms: bibliophile, book lover |
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| bookmaker | (noun) a gambler who accepts and pays off bets (especially on horse races) | Synonyms: bookie |
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| (noun) a maker of books; someone who edits or publishes or binds books | - |
| bookman | (noun) a learned person; someone who by long study has gained mastery in one or more disciplines | Synonyms: scholar, scholarly person |
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| bookmark | (noun) a marker (a piece of paper or ribbon) placed between the pages of a book to mark the reader's place | Synonyms: bookmarker |
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| bookmarker | (noun) a marker (a piece of paper or ribbon) placed between the pages of a book to mark the reader's place | Synonyms: bookmark |
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| bookmobile | (noun) a van with shelves of books; serves as a mobile library or bookstore | - |
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| bookplate | (noun) a label identifying the owner of a book in which it is pasted | Synonyms: ex libris |
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| bookseller | (noun) the proprietor of a bookstore | - |
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| bookshelf | (noun) a shelf on which to keep books | - |
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| bookshop | (noun) a shop where books are sold | Synonyms: bookstall, bookstore |
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| bookstall | (noun) a shop where books are sold | Synonyms: bookshop, bookstore |
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| bookstore | (noun) a shop where books are sold | Synonyms: bookshop, bookstall |
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| bookworm | (noun) someone who spends a great deal of time reading | - |
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| (noun) a person who pays more attention to formal rules and book learning than they merit | Synonyms: pedant, scholastic |