| 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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| bareboat | (noun) a vessel (such as a yacht) that can be chartered without a captain or crew or provisions | - |
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| bareboating | (noun) boating by chartering a bareboat and providing your own crew and provisions | - |
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| baseboard | (noun) a molding covering the joint formed by a wall and the floor | Synonyms: mopboard, skirting board |
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| bebop | (noun) an early form of modern jazz (originating around 1940) | Synonyms: bop |
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| 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 |
| bluebottle | (noun) blowfly with iridescent blue body; makes a loud buzzing noise in flight | Synonyms: Calliphora vicina |
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| (noun) an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers | Synonyms: bachelor's button, Centaurea cyanus, cornflower |
| casebook | (noun) a book in which detailed written records of a case are kept and which are a source of information for subsequent work | - |
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| centreboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centerboard, drop keel, sliding keel |
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| cheeseboard | (noun) tray on which cheeses are served | Synonyms: cheese tray |
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| chequebook | (noun) a book issued to holders of checking accounts | Synonyms: checkbook |
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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 | - |
| fibreboard | (noun) wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets | Synonyms: fiberboard, particle board |
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| fireboat | (noun) a boat equipped to fight fires on ships or along a waterfront | - |
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| firebomb | (noun) a bomb that is designed to start fires; is most effective against flammable targets (such as fuel) | Synonyms: incendiary, incendiary bomb |
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| firebox | (noun) a furnace (as on a steam locomotive) in which fuel is burned | - |
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| foreboding | (noun) an unfavorable omen | - |
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| (noun) a feeling of evil to come | Synonyms: boding, premonition, presentiment |
| freebooter | (noun) someone who takes spoils or plunder (as in war) | Synonyms: despoiler, looter, pillager, plunderer, raider, spoiler |
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| gameboard | (noun) a flat portable surface (usually rectangular) designed for board games | Synonyms: board |
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| gazebo | (noun) a small roofed building affording shade and rest | Synonyms: summerhouse |
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| guidebook | (noun) something that offers basic information or instruction | Synonyms: guide |
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| hellebore | (noun) any plant of the Eurasian genus Helleborus | - |
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| (noun) perennial herbs of the lily family having thick toxic rhizomes | Synonyms: false hellebore |
| helleborine | (noun) any of several orchids of the genus Cephalanthera | - |
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| (noun) any of various orchids of the genus Epipactis | - |
| (noun) any of several small temperate and tropical orchids having mottled or striped leaves and spikes of small yellowish-white flowers in a twisted raceme | Synonyms: rattlesnake plantain |
| homebody | (noun) a person who seldom goes anywhere; one not given to wandering or travel | Synonyms: stay-at-home |
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| homebound | (noun) people who are confined to their homes | - |
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| homeboy | (noun) a male friend from your neighborhood or hometown | - |
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| (noun) a fellow male member of a youth gang | - |
| horsebox | (noun) a conveyance (railroad car or trailer) for transporting racehorses | - |
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| houseboat | (noun) a barge that is designed and equipped for use as a dwelling | - |
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| iceboat | (noun) a ship with a reinforced bow to break up ice and keep channels open for navigation | Synonyms: icebreaker |
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| (noun) a sailing vessel with runners and a cross-shaped frame; suitable for traveling over ice | Synonyms: ice yacht, scooter |
| icebox | (noun) white goods in which food can be stored at low temperatures | Synonyms: refrigerator |
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| jukebox | (noun) a cabinet containing an automatic record player; records are played by inserting a coin | Synonyms: nickelodeon |
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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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| lifeboat | (noun) a strong sea boat designed to rescue people from a sinking ship | - |
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| notebook | (noun) a small compact portable computer | Synonyms: notebook computer |
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| (noun) a book with blank pages for recording notes or memoranda | - |
| pageboy | (noun) a smooth hair style with the ends of the hair curled inward | - |
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| (noun) a boy who is employed to run errands | Synonyms: page |
| pasteboard | (noun) stiff cardboard made by pasting together layers of paper | - |
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| phlebogram | (noun) an X ray of a vein injected with a radiopaque contrast medium | Synonyms: venogram |
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| phlebothrombosis | (noun) thrombosis of a vein without prior inflammation of the vein; associated with sluggish blood flow (as in prolonged bedrest or pregnancy or surgery) or with rapid coagulation of the blood | Synonyms: venous thrombosis |
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| phlebotomist | (noun) someone who practices phlebotomy | - |
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| phlebotomus | (noun) a mild viral disease transmitted by the bite of the sand fly Phlebotomus papatasii | Synonyms: pappataci fever, sandfly fever |
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| phlebotomy | (noun) surgical incision into a vein; used to treat hemochromatosis | Synonyms: venesection |
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| phonebook | (noun) a directory containing an alphabetical list of telephone subscribers and their telephone numbers | Synonyms: phone book, telephone book, telephone directory |
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| placebo | (noun) (Roman Catholic Church) vespers of the office for the dead | - |
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| (noun) an innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug | - |
| rattlebox | (noun) any of various plants of the genus Crotalaria having inflated pods within which the seeds rattle; used for pasture and green-manure crops | Synonyms: crotalaria |
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| rebound | (noun) the act of securing possession of the rebounding basketball after a missed shot | - |
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| (noun) a reaction to a crisis or setback or frustration | - |
| (noun) a movement back from an impact | Synonyms: backlash, recoil, repercussion |
| reboxetine | (noun) an antidepressant drug that blocks the reuptake of norepinephrine | Synonyms: Edronax |
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| rebozo | (noun) a long woolen or linen scarf covering the head and shoulders (also used as a sling for holding a baby); traditionally worn by Latin-American women | - |
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| saddlebow | (noun) handgrip formed by the raised front part of a saddle | Synonyms: pommel |
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| sauceboat | (noun) a dish (often boat-shaped) for serving gravy or sauce | Synonyms: boat, gravy boat, gravy holder |
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| scoreboard | (noun) a large board for displaying the score of a contest (and some other information) | - |
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| seborrhea | (noun) a condition in which overactivity of the sebaceous glands causes the skin to become oily | - |
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| shoebox | (noun) an oblong rectangular (usually cardboard) box designed to hold a pair of shoes | - |
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| (noun) a structure resembling a shoebox (as a rectangular building or a cramped room or compartment) | - |
| shuffleboard | (noun) a game in which players use long sticks to shove wooden disks onto the scoring area marked on a smooth surface | Synonyms: shovelboard |
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| sideboard | (noun) a piece of furniture that stands at the side of a dining room; has shelves and drawers | Synonyms: buffet, counter |
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| (noun) a board that forms part of the side of a bed or crib | - |
| (noun) a removable board fitted on the side of a wagon to increase its capacity | - |
| sideboob | (noun) A breast exposed from the side | - |
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| skateboard | (noun) a board with wheels that is ridden in a standing or crouching position and propelled by foot | - |
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| skateboarder | (noun) someone who skates on a skateboard | - |
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| skateboarding | (noun) the sport of skating on a skateboard | - |
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| somebody | (noun) a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential | Synonyms: individual, mortal, person, someone, soul |
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| stableboy | (noun) someone employed in a stable to take care of the horses | Synonyms: groom, hostler, ostler, stableman |
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| wakeboard | (noun) a buoyant board (resembling a surfboard) that is used to ride over water while being pulled behind a motorboat | Synonyms: wake board |
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| whaleboat | (noun) a long narrow boat designed for quick turning and use in rough seas | - |
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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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