| feudalism | feudalismo |
| Feuerbach | Feuerbach |
| Feuillant | Club des Feuillants |
| FEVE | Ferrocarriles de Vía Estrecha |
| fever | fiebre |
| fevered | febril |
| feverfew | matricaria |
| feverish | febril |
| feverishly | febrilmente |
| few | poco |
| fewer | menos |
| fewest | menos |
| Fexed | Sociedad |
| fey | destinado |
| Feyd-Rautha | Feyd Rautha |
| Feyenoord | Feyenoord Rotterdam |
| Feynman diagram | Diagrama de Feynman |
| fez | fez |
| ff. | ss. |
| FG | Foggia |
| Fgura | Fgura |
| FHSST Physics | Física |
| Fianarantsoa Province | Provincia de Fianarantsoa |
| fiancé | novio |
| fiancée | novia |
| fiasco | fiasco |
| Fiat | FIAT |
| Fiat Doblò | Fiat Doblò |
| Fiat Ducato | Fiat Ducato |
| Fiat Duna | Fiat Duna |
| Fiat Elba | Fiat Elba |
| Fiat Idea | Fiat Idea |
| Fiat Palio | Fiat Palio |
| Fiat Punto | Fiat Punto |
| fib | mentir |
| FIBA Africa | FIBA África |
| FIBA Africa Championship | Afrobasket |
| FIBA Americas | FIBA Américas |
| FIBA Americas Championship | Campeonato FIBA Américas |
| FIBA Asia | FIBA Asia |
| FIBA Europe | FIBA Europa |
| FIBA Hall of Fame | Salón de la Fama FIBA |
| FIBA Oceania | FIBA Oceanía |
| FIBA World Championship | Campeonato Mundial de Baloncesto |
| fibber | mentirosa |
| fiber | fibra |
| Fiber cement | Fibrocemento |
| Fiber distributed data interface | Fiber Distributed Data Interface |
| fiber glass | fibra de vidrio |
| Fiber optic | Cable de fibra óptica |
| fiber optics | fibra óptica |
| Fiber to the premises | FTTH |
| fiber-glass | fibra de vidrio |
| Fiber-optic communication | FTTH |
| Fiber-optics | Fibra óptica |
| fiberboard | panel de madera conglomerada |
| fiberglass | fibra de vidrio |
| Fibonacci | Leonardo de Pisa |
| Fibonacci number | Sucesión de Fibonacci |
| Fibrated cement | Fibrocemento |
| fibre | fibra |
| Fibre optic gyroscope | Giróscopo de fibra óptica |
| fibreglass | fibra de vidrio |
| fibrillation | fibrilación |
| Fibrille | Fibrilla |
| Fibrodysplasia ossificans progressiva | Fibrodisplasia osificante progresiva |
| Fibronectin | Fibronectina |
| fibrositis | fibroma |
| fibrous | fibroso |
