| FACSIMILIST | • facsimilist n. One who produces facsimiles. • FACSIMILIST n. one who makes facsimiles. |
| FALLIBILIST | • fallibilist n. An advocate or supporter of fallibilism. • FALLIBILIST n. one who holds to the doctrine that empirical knowledge is uncertain. |
| FEASIBILITY | • feasibility n. The state of being feasible or possible. • FEASIBILITY n. the state of being feasible. |
| FEBRILITIES | • febrilities n. Plural of febrility. • FEBRILITY n. feverishness. |
| FERTILISING | • fertilising v. Present participle of fertilise. • FERTILISE v. to make fertile, also FERTILIZE. |
| FERTILITIES | • fertilities n. Plural of fertility. • FERTILITY n. the state of being fertile. |
| FISHABILITY | • fishability n. The quality or degree of being fishable. • FISHABILITY n. the state of being fishable. |
| FISHTAILING | • fishtailing v. Present participle of fishtail. • FISHTAIL v. to swing the tail of a moving vehicle from side to side. |
| FISSILITIES | • fissilities n. Plural of fissility. • FISSILITY n. the ability to be split. |
| FLORIDITIES | • floridities n. Plural of floridity. • FLORIDITY n. the state of being florid, also FLORIDNESS. |
| FRAGILITIES | • fragilities n. Plural of fragility. • FRAGILITY n. the state of being fragile. |
| FRIVOLITIES | • frivolities n. Plural of frivolity. • FRIVOLITY n. a trifling habit or nature. |
| FUSTILIRIAN | • FUSTILIRIAN n. (Shakespeare) a term of abuse, also FUSTILARIAN, FUSTILLIRIAN. |
| INFANTILISE | • infantilise v. Non-Oxford British spelling standard spelling of infantilize. • INFANTILISE v. to render infantile, also INFANTILIZE. |
| INFANTILISM | • infantilism n. An emotional dependency on being treated as an infant. • infantilism n. (Sexuality) A paraphilia based on the sight or feeling of diapers, or being diapered. • INFANTILISM n. retention of childish physical, mental, or emotional qualities in adult life. |
| INFLICTIONS | • inflictions n. Plural of infliction. • INFLICTION n. the act of inflicting. |