| FILTHIEST | • filthiest adj. Superlative form of filthy: most filthy. • FILTHY adj. offensively dirty. |
| FLECHETTE | • flechette n. A small sharp antipersonnel projectile, used as shrapnel, fired from a shotgun, or scattered from an aircraft. • flechette n. (Dated, uncountable) The game of lawn darts. • fléchette n. Alternative form of flechette. |
| FOOTCLOTH | • footcloth n. (Historical) A housing or caparison for a horse. • FOOTCLOTH n. a housing or caparison for a horse. |
| FOOTLIGHT | • footlight n. A stage light located at the front edge of the stage that illuminates the actors from foot level up. • foot-light n. Dated spelling of footlight. • FOOTLIGHT n. one of a row of lights along the front of a theatre stage. |
| HEARTFELT | • heartfelt adj. Believed or felt deeply and sincerely. • heart-felt adj. Alternative spelling of heartfelt. • HEARTFELT adj. deeply felt. |
| LIGHTFAST | • lightfast adj. Resistant to fading. • LIGHTFAST adj. of a fabric, that doesn't fade on exposure to light. |
| THEFTLESS | • theftless adj. Without theft. • THEFTLESS adj. without theft. |
| THIRSTFUL | • thirstful adj. Thirsty. • THIRSTFUL adj. thirsty. |
| THREATFUL | • threatful adj. Threatening. • THREATFUL adj. full of threats; having a menacing appearance. |
| THRIFTILY | • thriftily adv. In a thrifty manner; economically. • THRIFTY adv. frugal. |
| THRUSTFUL | • thrustful adj. Tending to thrust oneself forward; pushy. • THRUSTFUL adj. pushy, assertive. |
| TOOTHFULS | • toothfuls n. Plural of toothful. • TOOTHFUL n. a small drink of spirits. |
| TOPFLIGHT | • topflight adj. Best, A-one, superior. • top-flight adj. Of the highest rank, or peak of excellence. • top-flight adj. In the highest division. |
| TWELFTHLY | • twelfthly adv. In the twelfth place. • TWELFTH adv. twelfth in sequence. |