| FIBRILS | • fibrils n. Plural of fibril. • FIBRIL n. a small fibre, also FIBRILLA. |
| FILINGS | • filings n. Plural of filing. • FILING n. a particle removed by a file. |
| FILLIES | • fillies n. Plural of filly. • FILLY n. a female horse up to four years old. |
| FILLIPS | • fillips n. Plural of fillip. • FILLIP v. to strike sharply. |
| FILMISH | • filmish adj. (Informal, colloquial) Of, relating to, or characteristic of films, movies, or the film industry; cinematic. • FILMISH adj. in a style associated with films. |
| FINALIS | • FINALIS n. (Latin) a type of tone in medieval music. |
| FINIALS | • finials n. Plural of finial. • FINIAL n. a decorating on the top of a gable. |
| FINLITS | • FINLIT n. (colloquial) financial literacy. |
| FISHILY | • fishily adv. In a fishy manner. • FISHY adv. consisting of fish. |
| FISSILE | • fissile adj. Able to be split. • fissile adj. (Geology) Easily split along a grain. • fissile adj. (Physics) Capable of sustaining a nuclear fission chain reaction. |
| FOILIST | • foilist n. (Fencing) A fencer who fights with a foil. • FOILIST n. one who fences with a foil. |
| FUSILLI | • fusilli n. Pasta in the shape of short spirals. • FUSILLI n. (Italian) pasta in the form of short thick spirals. |
| INFILLS | • infills n. Plural of infill. • infills v. Third-person singular simple present indicative form of infill. • in-fills n. Plural of in-fill. |
| MISFILE | • misfile v. (Transitive) To file incorrectly; to file in the wrong place or the wrong way. • MISFILE v. to file in the wrong place. |
| RIFLIPS | • riflips n. Plural of riflip. • RIFLIP n. the genetic difference between two individuals. |