| EVENFALLS | • evenfalls n. Plural of evenfall. • EVENFALL n. the onset of evening. |
| FAILOVERS | • failovers n. Plural of failover. • FAILOVER n. a procedure by which a computer system automatically transfers control to a backup system on detecting a failure. |
| FAVORLESS | • favorless adj. Alternative form of favourless. • FAVORLESS adj. (US) without favor, also FAVOURLESS. |
| FESTIVALS | • festivals n. Plural of festival. • FESTIVAL n. a time of celebration. |
| FLASHOVER | • flashover n. The near simultaneous ignition of all combustible material in an enclosed area. • flashover n. An unintended electric discharge or arc over or around an insulator. • flash␣over n. Alternative form of flashover. |
| FLAVANOLS | • flavanols n. Plural of flavanol. • FLAVANOL n. a derivative of flavone, also FLAVONOL. |
| FLAVONOLS | • flavonols n. Plural of flavonol. • FLAVONOL n. a derivative of flavone, also FLAVANOL. |
| FLAVORERS | • flavorers n. Plural of flavorer. • FLAVORER n. one that flavors, also FLAVOURER. |
| FLAVORIST | • flavorist n. A scientist who develops flavors. • FLAVORIST n. a person who creates flavourings for drinks, perfumes, etc., also FLAVOURIST. |
| FLAVOROUS | • flavorous adj. Having flavour; flavorsome. • FLAVOROUS adj. full of flavor. |
| FLYLEAVES | • flyleaves n. Plural of flyleaf. • FLYLEAF n. a blank page at the beginning or end of a book. |
| HALFLIVES | • halflives n. Plural of halflife. • half-lives n. Plural of half-life. • HALFLIFE n. the time taken for half a sample of radioactive material to decay. |
| LIFESAVER | • lifesaver n. Someone or something that saves lives. • lifesaver n. (Figuratively) Someone or something that is very useful or helpful. • life-saver n. Alternative spelling of lifesaver. |
| OVERFALLS | • overfalls n. Plural of overfall. • overfalls v. Third-person singular simple present indicative form of overfall. • OVERFALL v. to fall over. |