| foundry | fonderia |
| Founex | Founex |
| fount | fonte |
| fountain | origine |
| Fountain of Neptune | Fontana del Nettuno |
| Fountain of Youth | Fonte della giovinezza |
| fountain pen | penna stilografica |
| fountains | fontana a getto |
| Fountains Abbey | Abbazia di Fountains |
| Fountains in Rome | Fontane di Roma |
| founts | scaturire |
| Fouquières-lès-Béthune | Fouquières-lès-Béthune |
| four | quattro |
| Four bombs rock London | Attentato esplosivo a Londra |
| Four Brothers | Four Brothers |
| Four Classical Novels | Quattro grandi libri meravigliosi |
| Four color theorem | Teorema dei quattro colori |
| Four corner method | Metodo dei quattro angoli |
| Four Corners | Four Corners |
| Four Corners Monument | Four Corners |
| Four cycle engine | Ciclo Otto |
| four engined | quadrimotore |
| four fold | quadruplice |
| four footed | quadrupede |
| Four Great Classical Novels | Quattro grandi libri meravigliosi |
| four handed | quadrumane |
| Four Heavenly Kings | Lokapala |
| Four Hills Tournament | Tournée dei quattro trampolini |
| Four Horsemen of the Apocalypse | Cavalieri dell'Apocalisse |
| four hundred | quattrocento |
| Four Past Midnight | Quattro dopo mezzanotte |
| Four Pillars of the Green Party | Quattro Pilastri del Partito Verde |
| Four Quartets | Quattro quartetti |
| Four Rooms | Four Rooms |
| Four Seasons | Le quattro stagioni |
| Four Seasons Hotels and Resorts | Four Seasons Hotels and Resorts |
| four sided | quadrilatero |
| Four sons of Horus | Figli di Horo |
| Four stags of Yggdrasill | Cervi di Yggdrasill |
| four stroke engine | motore a quattro tempi |
| four thousand | quattromila |
| four times as much | quadruplo |
