| FATHERLESS | • fatherless adj. Without a (living) father. • fatherless adj. (Figurative) Without a known author or inventor. • FATHERLESS adj. without a father. |
| FATHOMLESS | • fathomless adj. Very deep (especially of water deeper than a lead line can measure); bottomless. • fathomless adj. (By extension) unfathomable or incomprehensible. • FATHOMLESS adj. incapable of being fathomed. |
| FELDSPATHS | • feldspaths n. Plural of feldspath. • FELDSPATH n. (obsolete) a common rock-forming mineral, also FELDSPAR, FELSPAR. |
| FISHPLATES | • fishplates n. Plural of fishplate. • FISHPLATE n. an iron plate used to join railway lines. |
| FLASHTUBES | • flashtubes n. Plural of flashtube. • FLASHTUBE n. a gas discharge tube that produces very brief intense flashes of light and is used esp. in photography. |
| FLATFISHES | • flatfishes n. Plural of flatfish. • FLATFISH n. a marine fish that habitually lies on its side. |
| FLATSHARES | • flatshares n. Plural of flatshare. • FLATSHARE n. an arrangement whereby a flat is shared. |
| FLATWASHES | • FLATWASH n. laundry that can be ironed mechanically, also FLATWORK. |
| LOANSHIFTS | • loanshifts n. Plural of loanshift. • LOANSHIFT n. the adaptation of a word from one language to another. |
| OUTFLASHES | • outflashes v. Third-person singular simple present indicative form of outflash. • OUTFLASH v. to flash more brightly. |
| SAFELIGHTS | • safelights n. Plural of safelight. • SAFELIGHT n. a light used in a photographic darkroom etc., which emits light of an intensity and colour which will not damage the materials being processed. |
| SALTFISHES | • saltfishes n. Plural of saltfish. • SALTFISH n. salted cod. |
| SHORTFALLS | • shortfalls n. Plural of shortfall. • short-falls n. Plural of short-fall. • SHORTFALL n. the fact or amount of falling short. |
| SLASHFESTS | • SLASHFEST n. a film or computer game that involves bloody slayings involving blades. |