| FALTERING | • faltering adj. Hesitant, halting. • faltering v. Present participle of falter. • faltering n. Hesitancy. |
| FELTERING | • feltering v. Present participle of felter. • FELTER v. to mat together like felt. |
| FILTERING | • filtering v. Present participle of filter. • filtering n. The process of passing something through a filter. • filtering n. Something that passes through a filter. |
| FIRELIGHT | • firelight n. The light of a fire, such as from a campfire or fireplace. • FIRELIGHT n. the light of a (usually domestic) fire. |
| FIRSTLING | • firstling n. The first produce or result, notably firstborn offspring. • firstling n. The first of a class or kind. • firstling n. The thing first thought or done. |
| FLIGHTIER | • flightier adj. Comparative form of flighty: more flighty. • FLIGHTY adj. fickle. |
| FLIRTINGS | • flirtings n. Plural of flirting. • FLIRTING n. the act of flirting. |
| FORTILAGE | • fortilage n. (Obsolete) A little fort; a blockhouse. • FORTILAGE n. (Spenser) fortress, stronghold. |
| FRAGILEST | • fragilest adj. Superlative form of fragile: most fragile. • FRAGILE adj. easily broken. |
| FRAGILITY | • fragility n. The condition or quality of being fragile; brittleness; frangibility. • fragility n. Weakness; feebleness. • fragility n. (Obsolete) Liability to error and sin; frailty. |
| FRIGHTFUL | • frightful adj. (Obsolete) Full of fright, whether. • frightful adj. Full of something causing fright, whether. • frightful adv. (Dialect) Frightfully; very. |
| FRUGALIST | • frugalist n. A person who acts frugally. • FRUGALIST n. a person who is frugal. |
| FRUGALITY | • frugality n. The quality of being frugal; prudent economy; thrift. • frugality n. A sparing use; sparingness. • FRUGALITY n. the state of being frugal. |
| FULGURITE | • fulgurite n. Glass formed by a lightning strike melting sand or other material. • FULGURITE n. a vitrified sand tube produced by the striking of lightning on sand. |
| GILLFLIRT | • gillflirt n. Alternative form of jillflirt. • GILLFLIRT n. (archaic) a wanton girl, also JILLFLIRT. |
| PREFLIGHT | • preflight adj. Taking place before the start of a flight. • preflight adj. (Computing) Serving to confirm that requests can be accepted, before sending an actual request. • preflight n. An inspection of an aircraft before the start of a flight. |
| REFLATING | • reflating v. Present participle of reflate. • REFLATE v. to inflate again. |
| TELFERING | • TELFER v. to transport by a system of aerial cable cars, also TELPHER. |
| TRIFLINGS | • triflings n. Plural of trifling. • TRIFLING n. the act of wasting time. |
| TRUFFLING | • truffling n. Searching for, and digging up truffles. • TRUFFLING n. the act of gathering truffles. |