| aitchbone | (noun) a cut of beef including the H-shaped rump bone | - |
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| anklebone | (noun) the bone in the ankle that articulates with the leg bones to form the ankle joint | Synonyms: astragal, astragalus, talus |
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| backbone | (noun) the part of a network that connects other networks together | - |
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| (noun) the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved | Synonyms: spine |
| (noun) fortitude and determination | Synonyms: grit, gumption, guts, moxie, sand |
| (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: back, rachis, spinal column, spine, vertebral column |
| (noun) a central cohesive source of support and stability | Synonyms: anchor, keystone, linchpin, lynchpin, mainstay |
| bicarbonate | (noun) a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate | Synonyms: hydrogen carbonate |
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| billabong | (noun) a branch of a river made by water flowing from the main stream only when the water level is high | - |
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| (noun) a stagnant pool of water in the bed of a stream that flows intermittently | - |
| bluebonnet | (noun) a brimless dark blue Scottish cap with a flat top and a plume on one side | Synonyms: Balmoral |
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| (noun) low-growing annual herb of southwestern United States (Texas) having silky foliage and blue flowers; a leading cause of livestock poisoning in the southwestern United States | Synonyms: buffalo clover, Lupinus subcarnosus, Texas bluebonnet |
| 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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| bourbon | (noun) whiskey distilled from a mash of corn and malt and rye and aged in charred oak barrels | - |
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| breastbone | (noun) the flat bone that articulates with the clavicles and the first seven pairs of ribs | Synonyms: sternum |
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| carbon | (noun) a copy made with carbon paper | Synonyms: carbon copy |
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| (noun) an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds | Synonyms: atomic number 6, C |
| (noun) a thin paper coated on one side with a dark waxy substance (often containing carbon); used to transfer characters from the original to an under sheet of paper | Synonyms: carbon paper |
| carbonado | (noun) a piece of meat (or fish) that has been scored and broiled | - |
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| (noun) an inferior dark diamond used in industry for drilling and polishing | Synonyms: black diamond |
| carbonara | (noun) sauce for pasta; contains eggs and bacon or ham and grated cheese | - |
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| carbonate | (noun) a salt or ester of carbonic acid (containing the anion CO3) | - |
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| carbonation | (noun) saturation with carbon dioxide (as soda water) | - |
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| carbonator | (noun) a device that carries out carbonation. | Synonyms: soda carbonator, soda maker |
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| carbonisation | (noun) the destructive distillation of coal (as in coke ovens) | Synonyms: carbonization |
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| carbonization | (noun) the destructive distillation of coal (as in coke ovens) | Synonyms: carbonisation |
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| carbonyl | (noun) a compound containing metal combined with carbon monoxide | - |
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| cheekbone | (noun) the arch of bone beneath the eye that forms the prominence of the cheek | Synonyms: jugal bone, malar, malar bone, os zygomaticum, zygomatic, zygomatic bone |
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| chlorofluorocarbon | (noun) a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans | Synonyms: CFC |
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| collarbone | (noun) bone linking the scapula and sternum | Synonyms: clavicle |
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| crossbones | (noun) two crossed bones (or a representation of two crossed bones) used as a symbol danger or death | - |
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| ebonite | (noun) a hard nonresilient rubber formed by vulcanizing natural rubber | Synonyms: hard rubber, vulcanite |
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| ebony | (noun) a very dark black | Synonyms: coal black, jet black, pitch black, sable, soot black |
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| (noun) tropical tree of southern Asia having hard dark-colored heartwood used in cabinetwork | Synonyms: Diospyros ebenum, ebony tree |
| (noun) hard dark-colored heartwood of the ebony tree; used in cabinetwork and for piano keys | - |
| embonpoint | (noun) the bodily property of being well rounded | Synonyms: plumpness, roundness |
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| fishbone | (noun) a bone of a fish | - |
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| fluorocarbon | (noun) a halocarbon in which some hydrogen atoms have been replaced by fluorine; used in refrigerators and aerosols | - |
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| gibbon | (noun) smallest and most perfectly anthropoid arboreal ape having long arms and no tail; of southern Asia and East Indies | Synonyms: Hylobates lar |
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| halocarbon | (noun) one of various compounds of carbon and any of the halogens | - |
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| heelbone | (noun) the largest tarsal bone; forms the human heel | Synonyms: calcaneus, os tarsi fibulare |
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| herringbone | (noun) a twilled fabric with a herringbone pattern | - |
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| (noun) a pattern of columns of short parallel lines with all the lines in one column sloping one way and lines in adjacent columns sloping the other way; it is used in weaving, masonry, parquetry, embroidery | Synonyms: herringbone pattern |
| hipbone | (noun) large flaring bone forming one half of the pelvis; made up of the ilium and ischium and pubis | Synonyms: innominate bone |
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| hydrocarbon | (noun) an organic compound containing only carbon and hydrogen | - |
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| hydrochlorofluorocarbon | (noun) a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere | Synonyms: HCFC |
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| hydrofluorocarbon | (noun) a fluorocarbon emitted as a by-product of industrial manufacturing | Synonyms: HFC |
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| jaboncillo | (noun) evergreen of tropical America having pulpy fruit containing saponin which was used as soap by Native Americans | Synonyms: China tree, chinaberry, false dogwood, Sapindus saponaria |
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| jambon | (noun) meat cut from the thigh of a hog (usually smoked) | Synonyms: gammon, ham |
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| jawbone | (noun) the jaw in vertebrates that is hinged to open the mouth | Synonyms: jowl, lower jaw, lower jawbone, mandible, mandibula, mandibular bone, submaxilla |
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| knucklebones | (noun) a game in which jackstones are thrown and picked up in various groups between bounces of a small rubber ball | Synonyms: jacks, jackstones |
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| lazybones | (noun) a lazy person | - |
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| marrowbone | (noun) a bone containing edible marrow; used especially in flavoring soup | - |
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| perfluorocarbon | (noun) a powerful greenhouse gas emitted during the production of aluminum | Synonyms: PFC |
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| radiocarbon | (noun) a radioactive isotope of carbon | Synonyms: carbon 14 |
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| redbone | (noun) a speedy red or red-and-tan American hound | - |
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| ribbon | (noun) notion consisting of a narrow strip of fine material used for trimming | - |
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| (noun) a long strip of inked material for making characters on paper with a typewriter | Synonyms: typewriter ribbon |
| (noun) an award for winning a championship or commemorating some other event | Synonyms: decoration, laurel wreath, medal, medallion, palm |
| (noun) any long object resembling a thin line | Synonyms: thread |
| ribbonfish | (noun) marine fish having a long compressed ribbonlike body | - |
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| (noun) thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin | Synonyms: king of the herring, oarfish, Regalecus glesne |
| ribbonwood | (noun) small tree or shrub of New Zealand having a profusion of axillary clusters of honey-scented paper-white flowers and whose bark is used for cordage | Synonyms: Hoheria populnea, houhere, lacebark |
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| (noun) deciduous New Zealand tree whose inner bark yields a strong fiber that resembles flax and is called New Zealand cotton | Synonyms: Plagianthus betulinus, Plagianthus regius, ribbon tree |
| ribonuclease | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonucleinase, RNase |
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| ribonucleinase | (noun) a transferase that catalyzes the hydrolysis of ribonucleic acid | Synonyms: ribonuclease, RNase |
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| sawbones | (noun) a physician who specializes in surgery | Synonyms: operating surgeon, surgeon |
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| shinbone | (noun) the inner and thicker of the two bones of the human leg between the knee and ankle | Synonyms: shin, shin bone, tibia |
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| sunbonnet | (noun) a large bonnet that shades the face; worn by girls and women | - |
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| thighbone | (noun) the longest and thickest bone of the human skeleton; extends from the pelvis to the knee | Synonyms: femoris, femur |
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| trombone | (noun) a brass instrument consisting of a long tube whose length can be varied by a U-shaped slide | - |
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| trombonist | (noun) a musician who plays the trombone | Synonyms: trombone player |
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| vagabond | (noun) anything that resembles a vagabond in having no fixed place | - |
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| (noun) a wanderer who has no established residence or visible means of support | Synonyms: clochard, drifter, floater, vagrant |
| vagabondage | (noun) travelling about without any clear destination | Synonyms: roving, wandering |
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| whalebone | (noun) a horny material from the upper jaws of certain whales; used as the ribs of fans or as stays in corsets | Synonyms: baleen |
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| wishbone | (noun) the furcula of a domestic fowl | Synonyms: wishing bone |
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