| FAULTLINE | • faultline n. Alternative spelling of fault line. • fault-line n. Alternative spelling of fault line. • fault␣line n. (Geology) The line formed by the intersection of the plane of a fault with the surface of the Earth. |
| FELLATING | • fellating v. Present participle of fellate. • FELLATE v. to stimulate the penis orally. |
| FELLATION | • fellation n. Alternative form of fellatio. • FELLATION n. oral stimulation of the penis, also FELLATIO. |
| FLANNELET | • flannelet n. Alternative spelling of flannelette. • FLANNELET n. a cotton imitation of flannel, also FLANNELETTE. |
| FLATLANDS | • flatlands n. Plural of flatland. • flatlands n. A terrain that varies little in elevation. • FLATLAND n. land lacking variation in elevation. |
| FLATLINED | • flatlined v. Simple past tense and past participle of flatline. • FLATLINE v. to register as having no brain waves or heartbeat. |
| FLATLINER | • flatliner n. (Rare) A patient with no heartbeat. • FLATLINER n. one who flatlines. |
| FLATLINES | • flatlines v. Third-person singular simple present indicative form of flatline. • flat␣lines n. Plural of flat line. • FLATLINE v. to register as having no brain waves or heartbeat. |
| FLATLINGS | • flatlings adv. (Scotland) Alternative form of flatling. • FLATLINGS adv. (Spenser) with a flat side or edge, also FLATLING, FLATLONG. |
| FLATULENT | • flatulent adj. Affected by gas in the intestine; likely to fart. • flatulent adj. (Obsolete) Empty; vain. • FLATULENT adj. suffering from flatulence. |
| FLAUNTILY | • flauntily adv. In a flaunty manner. • FLAUNTY adv. showy. |
| FRONTALLY | • frontally adv. In a frontal manner. • FRONTAL adv. at the front. |
| MATFELLON | • MATFELLON n. the greater knapweed, also MATFELON. |
| NIGHTFALL | • nightfall n. The close of the day; the coming of night. • NIGHTFALL n. the onset or beginning of the night. |
| PLAINTFUL | • plaintful adj. (Obsolete) complaining; expressing sorrow audibly. • PLAINTFUL adj. (archaic) complaining, also PLAINFUL. |