| BEFORETIME | • beforetime adv. (Archaic) Formerly, previously. • BEFORETIME adv. (archaic) formerly. |
| BIODEFENSE | • biodefense n. Any defensive measure taken against an attack using bacteria, viruses or toxins. |
| BIOFUELLED | • biofuelled adj. Alternative form of biofueled. • BIOFUELLED adj. running on biofuel, also BIOFUELED. |
| BONEFISHES | • bonefishes n. Plural of bonefish. • BONEFISH n. a slender marine fish. |
| BUFOTENINE | • bufotenine n. (Organic chemistry) An alkaloid, found in the skins of some toads, related to serotonin. • BUFOTENINE n. a poisonous paralytic hallucinogenic drug. |
| FIBERSCOPE | • fiberscope n. (American spelling) a flexible fibreoptic device for viewing otherwise inaccessible areas. • FIBERSCOPE n. a medical instrument using fibre optic bundles, also FIBRESCOPE. |
| FIBRESCOPE | • fibrescope n. (Britain) An instrument, consisting of a fibre optic bundle, used to observe inaccessible areas. • FIBRESCOPE n. a medical instrument using fibre optic bundles, also FIBERSCOPE. |
| FIREBOMBED | • firebombed v. Simple past tense and past participle of firebomb. • FIREBOMB v. to attack with incendiary bombs. |
| FIREBOMBER | • firebomber n. One who carries out a firebombing attack. • FIREBOMBER n. one who uses FIREBOMBS. |
| FOREBITTER | • FOREBITTER n. a nautical ballad sung at the forebitts. |
| FOREBODIES | • forebodies n. Plural of forebody. • FOREBODY n. the forward part of a ship. |
| FOXBERRIES | • foxberries n. Plural of foxberry. • FOXBERRY n. the red whortleberry. |
| NONBELIEFS | • nonbeliefs n. Plural of nonbelief. • NONBELIEF n. absence of belief. |
| OVERBRIEFS | • OVERBRIEF v. to brief excessively. |
| SEBIFEROUS | • sebiferous adj. (Botany) Producing vegetable tallow. • sebiferous adj. (Physiology) Producing fat; sebaceous. • SEBIFEROUS adj. bearing fatty matter. |