| folle | absurd |
| Folleggiamento | Spree |
| Folles | Folles |
| folletto | genie |
| follia | foolishness |
| Follia per sette clan | Clans of the Alphane Moon |
| follicolare | follicular |
| follicolo | follicle |
| follicolo pilifero | hair follicle |
| Follis | Follis |
| Follow the Blind | Follow the Blind |
| Follow the Leader | Follow the Leader |
| follow-up | follow-up |
| Folo | Pholus |
| Folsom | Folsom |
| folto | thick |
| FOMA | Freedom of Mobile Multimedia Access |
| Fomalhaut | Fomalhaut |
| Fombuena | Fombuena |
| Fomes fomentarius | Fomes fomentarius |
| fon | blow-dryer |
| fonarsi i capelli | blow-dry |
| Fonassorbente | Noise abatement campaign |
| fondaccio | yeast |
| fondale | backdrop |
| fondale marino | seabed |
| fondamenta | base |
