| 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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| 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 |
| 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 | - |
| 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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| 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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