| BIOSAFETIES | • BIOSAFETY n. safety with respect to the effects of biological research. |
| FACTIONISTS | • factionists n. Plural of factionist. • FACTIONIST n. one who promotes faction. |
| FASCIATIONS | • fasciations n. Plural of fasciation. • FASCIATION n. bandaging or becoming bound up. |
| FASHIONIEST | • FASHIONY adj. fashionable. |
| FASHIONISTA | • fashionista n. A person who creates or promotes high fashion, i.e. a fashion designer or fashion editor. • fashionista n. A person who dresses according to the trends of fashion, or one who closely follows those trends. • FASHIONISTA n. a follower or setter of fashion, also FASHIONIST. |
| FASHIONISTS | • fashionists n. Plural of fashionist. • FASHIONIST n. a follower or setter of fashion, also FASHIONISTA. |
| FAVORITISMS | • favoritisms n. Plural of favoritism. • FAVORITISM n. the showing of special favor. |
| FESTILOGIES | • festilogies n. Plural of festilogy. • FESTILOGY n. a treatise on ecclesiastical festivals, also FESTOLOGY. |
| FICTIONISES | • fictionises v. Third-person singular simple present indicative form of fictionise. • FICTIONISE v. to make fictional, also FICTIONIZE. |
| FICTIONISTS | • fictionists n. Plural of fictionist. • FICTIONIST n. a writer of fiction. |
| FLORISTRIES | • FLORISTRY n. the art of cultivating and selling flowers. |
| FLUXIONISTS | • fluxionists n. Plural of fluxionist. • FLUXIONIST n. one skilled in fluxions. |
| FORTISSIMOS | • fortissimos n. Plural of fortissimo. • FORTISSIMO n. a very loud passage in music. |
| FORTUITISMS | • FORTUITISM n. belief in evolution by chance variation. |
| FORTUITISTS | • fortuitists n. Plural of fortuitist. • FORTUITIST n. one who believes in evolution by chance variation. |
| FUNGOSITIES | • fungosities n. Plural of fungosity. • FUNGOSITY n. the quality of being fungous. |
| FURIOSITIES | • FURIOSITY n. madness. |
| HISTORIFIES | • historifies v. Third-person singular simple present indicative form of historify. • HISTORIFY v. to record in history. |
| INFUSIONIST | • infusionist n. One who believes in infusionism. • INFUSIONIST n. a believer in infusionism. |
| PILOTFISHES | • pilotfishes n. Plural of pilotfish. • pilot␣fishes n. Plural of pilot fish. • PILOTFISH n. a tropical fish. |