| FAINEANTS | • faineants n. Plural of faineant. • fainéants n. Plural of fainéant. • FAINEANT n. (French) a lazy person. |
| FAINTNESS | • faintness n. The property of being or feeling faint. • FAINTNESS n. the state of being faint. |
| FASTENING | • fastening v. Present participle of fasten. • fastening n. A hook or similar restraint used to fasten things together; fastener. • FASTENING n. something that secures. |
| FENTANYLS | • fentanyls n. Plural of fentanyl. • FENTANYL n. a narcotic opioid. |
| FENTHIONS | • FENTHION n. an insecticide. |
| FONTANELS | • fontanels n. Plural of fontanel. • FONTANEL n. a membrane-covered gap between the immature parietal bones in the skull of a foetus or infant, also FONTANELLE. |
| FONTANGES | • fontanges n. Plural of fontange. • FONTANGE n. (French) a kind of tall headdress worn in the seventeenth century. |
| FRONTENIS | • frontenis n. A racquet sport played on a short pelota court. • FRONTENIS n. a racket used in a Basque ball game. |
| INFESTANT | • infestant n. That which infests something. • INFESTANT n. something that infests. |
| INFESTING | • infesting v. Present participle of infest. • INFEST v. to invade and swarm over. |
| INFINITES | • infinites n. Plural of infinite. • INFINITE n. something that has no limits. |
| INFLUENTS | • influents n. Plural of influent. • INFLUENT n. a tributary stream. |
| INTENSIFY | • intensify v. (Transitive) To render more intense. • intensify v. (Intransitive) To become intense, or more intense; to act with increasing power or energy. • INTENSIFY v. to make intense. |
| NIFTINESS | • niftiness n. Quality of being nifty. • NIFTINESS n. the state of being nifty. |
| OFTENNESS | • oftenness n. (Rare) The quality of happening often; frequency. • OFTENNESS n. frequency. |
| SOFTENING | • softening v. Present participle of soften. • softening n. The process of making something soft. • softening n. The process of becoming soft. |
| UNFASTENS | • unfastens v. Third-person singular simple present indicative form of unfasten. • UNFASTEN v. to release from a fastening. |
| UNFITNESS | • unfitness n. The characteristic of being unfit or ill-suited. • unfitness n. The characteristic of being unfit or out of physical shape. • UNFITNESS n. the state of being unfit. |
| UNSTIFFEN | • unstiffen v. To remove the stiffness from; to relax; to make pliant. • UNSTIFFEN v. to make not stiff. |