| ASTROFELLS | • ASTROFELL n. (Spenser) an unidentified bitter starlike plant, possibly aster, also ASTROPHEL. |
| CLOSETFULS | • closetfuls n. Plural of closetful. • CLOSETFUL n. the contents of a closet. |
| EFFORTLESS | • effortless adj. Without effort. • EFFORTLESS adj. showing or requiring little or no effort. |
| 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. |
| FLAGSTONES | • flagstones n. Plural of flagstone. • FLAGSTONE n. a large paving stone. |
| FLOATBASES | • FLOATBASE n. a place on a river, lake, etc. where float planes dock. |
| FLOWSTONES | • flowstones n. Plural of flowstone. • FLOWSTONE n. a general term for deposits formed by dripping and flowing water on walls and floors of caves. |
| FLYPOSTERS | • flyposters n. Plural of flyposter. • fly-posters n. Plural of fly-poster. • FLYPOSTER n. one who engages in FLYPOSTING. |
| FOOLISHEST | • foolishest adj. Superlative form of foolish: most foolish. • FOOLISH adj. lacking good sense or judgement. |
| FOOTLESSLY | • footlessly adv. In a clumsy or inept way. • footlessly adv. (Not comparable) Without feet. • FOOTLESS adv. without feet. |
| FORESTALLS | • forestalls v. Third-person singular simple present indicative form of forestall. • FORESTALL v. to prevent. |
| FORESTLESS | • forestless adj. Without a forest. • FORESTLESS adj. without a forest. |
| FROSTLINES | • frostlines n. Plural of frostline. • frost␣lines n. Plural of frost line. • FROSTLINE n. the depth to which the ground freezes in winter. |
| OUTFLASHES | • outflashes v. Third-person singular simple present indicative form of outflash. • OUTFLASH v. to flash more brightly. |
| OUTFLUSHES | • outflushes v. Third-person singular simple present indicative form of outflush. • OUTFLUSH v. to flush more strongly. |
| PROFITLESS | • profitless adj. Not yielding profit. • PROFITLESS adj. without profit. |
| SOFTSHELLS | • softshells n. Plural of softshell. • SOFTSHELL n. a moderate. |
| SOOTFLAKES | • sootflakes n. Plural of sootflake. • SOOTFLAKE n. a smut of soot. |
| STONEFLIES | • stoneflies n. Plural of stonefly. • STONEFLY n. a winged insect. |
| SULFONATES | • sulfonates n. Plural of sulfonate. • sulfonates v. Third-person singular simple present indicative form of sulfonate. • SULFONATE n. a salt of sulphonic acid. |