| BULLETPROOF | • bulletproof adj. (Of a material) Capable of withstanding a direct shot by a bullet fired from a gun. • bulletproof adj. (Idiomatic) Reliable, infallible, sturdy or error-tolerant. • bulletproof adj. (Usually of an idea or concept) Unbreakable, very tough. |
| COUNTERFLOW | • counterflow n. A flow in the opposite direction; or the flow of two fluids in opposite directions. • counterflow v. To flow in the opposite direction. • COUNTERFLOW n. the flow of a fluid in opposite directions, as in an apparatus. |
| COUNTERFOIL | • counterfoil n. The part of a cheque that is retained in the chequebook as a record; a stub. • COUNTERFOIL n. part of ticket or cheque retained by giver. |
| COUNTERFORT | • counterfort n. A buttress built against a wall. • counterfort n. A spur of a mountain range. • COUNTERFORT n. a buttress or arch supporting a retaining wall. |
| FLUOROMETER | • fluorometer n. An instrument used to detect and measure fluorescence. • FLUOROMETER n. an instrument for measuring fluorescence, also FLUORIMETER. |
| FLUOROMETRY | • fluorometry n. (Chemistry, physics) An analytical technique that uses fluorescence to detect and identify small samples… • FLUOROMETRY n. measurement by fluorometer, also FLUORIMETRY. |
| FLUOROTYPES | • fluorotypes n. Plural of fluorotype. • FLUOROTYPE n. (obsolete) photography by means of fluorides. |
| FOETIPAROUS | • foetiparous adj. Alternative form of fetiparous. • FOETIPAROUS adj. of marsupials, such as the kangaroo, giving birth to incompletely developed offspring, also FETIPAROUS. |
| FORETHOUGHT | • forethought n. Thinking beforehand or in advance, planning; prior or previous consideration; premeditation. • forethought n. Anticipation. • forethought n. Provident care; prudence. |
| FORFOUGHTEN | • FORFOUGHTEN adj. (Scots) exhausted, also FORFEUCHEN, FORFOCHEN, FORFOUGHEN. |
| HOUSEFRONTS | • housefronts n. Plural of housefront. • HOUSEFRONT n. the facade of a house. |
| MORTIFEROUS | • mortiferous adj. (Now rare) Causing spiritual death. • mortiferous adj. Causing physical death; deadly, fatal, lethal. • MORTIFEROUS adj. death-bringing; fatal. |
| OUTPERFORMS | • outperforms v. Third-person singular simple present indicative form of outperform. • OUTPERFORM v. to exceed in performance. |
| PROFOUNDEST | • profoundest adj. Superlative form of profound: most profound. • PROFOUND adj. very deep. |
| PUSSYFOOTER | • pussyfooter n. One who pussyfoots. • PUSSYFOOTER n. one who pussyfoots. |
| RUSTPROOFED | • rustproofed v. Simple past tense and past participle of rustproof. • RUSTPROOF v. to make resistant to rust, such as by applying a coating. |
| UNCOMFORTED | • uncomforted adj. Not comforted. • UNCOMFORTED adj. not comforted. |
| UNDERFOOTED | • underfooted v. Simple past tense and past participle of underfoot. • UNDERFOOT v. to underpin. |
| UNFORGOTTEN | • unforgotten adj. Not forgotten; still remembered. • unforgotten v. Past participle of unforget. • un-forgotten v. Past participle of un-forget. |