| FAILURES | • failures n. Plural of failure. • FAILURE n. the act of failing. |
| FISSURAL | • fissural adj. Pertaining to a fissure or fissures. • FISSURAL adj. like a fissure. |
| FISTULAR | • fistular adj. Tubelike; resembling a hollow cylinder. • fistular adj. Having tubelike parts of this form. • FISTULAR adj. hollow and cylindrical, like a pipe or reed, also FISTULATE, FISTULOSE, FISTULOUS. |
| FLORUITS | • floruits n. Plural of floruit. • FLORUIT n. (Latin) the period during which a person, movement, etc. was active. |
| FLOURISH | • flourish v. (Intransitive) To thrive or grow well. • flourish v. (Intransitive) To prosper or fare well. • flourish v. (Intransitive) To be in a period of greatest influence. |
| FLUERICS | • fluerics n. A subfield of fluidics, dealing with fluid components that perform functions not requiring the use of moving parts. • FLUERICS n. the technology of using fluid jets analogously to electricity, also FLUIDICS. |
| FLUORIDS | • fluorids n. Plural of fluorid. • FLUORID n. a compound of fluorine, also FLUORIDE. |
| FLUORINS | • FLUORIN n. a gaseous element, also FLUORINE. |
| FLURRIES | • flurries n. Plural of flurry. • flurries v. Third-person singular simple present indicative form of flurry. • FLURRY v. to agitate. |
| FLUSHIER | • FLUSHY adj. red-complexioned. |
| FRISKFUL | • friskful adj. (Rare) Lively; frolicsome. • FRISKFUL adj. brisk; lively; frolicsome. |
| FUSILEER | • fusileer n. Alternative form of fusilier. • FUSILEER n. a soldier armed with a fusil, also FUSILIER. |
| FUSILIER | • fusilier n. An infantryman armed with a form of flintlock musket. • fusilier n. (Britain) A soldier in any of several regiments that once fought with such weapons. • fusilier n. A fish in family Caesionidae, related to snappers. |
| LUCIFERS | • lucifers n. Plural of lucifer. • LUCIFER n. a friction match. |
| SIFFLEUR | • SIFFLEUR n. (French) a (male) professional whistler. |
| SULFURIC | • sulfuric adj. (American spelling, chemistry) Of, or relating to sulfur, especially in its higher oxidation state. • SULFURIC adj. pertaining to sulfur, also SULPHURIC. |
| SURFLIKE | • surflike adj. Resembling surf (breaking waves) or some aspect of it. • SURFLIKE adj. resembling breaking waves. |
| TRISTFUL | • tristful adj. (Archaic) Sad, melancholic. • TRISTFUL adj. (Shakespeare) sad, mournful, also TRIST, TRISTE. |