| formalism | formalismo |
| formalist | formalista |
| formalities | ceremonias |
| formality | formalidad |
| formalization | formalidad |
| formalize | formalizar |
| formally | expreso |
| format | formato |
| Format CD-I | CD-interactivo |
| Format coverage | Cubierta |
| formation | articulación |
| Formation and evolution of the Solar System | Formación y evolución del Sistema Solar |
| Formation of elements | Formación de los elementos |
| Formation of galaxies | Formación de las galaxias |
| Formation of stars | Formación de las estrellas |
| formative | formativo |
| formatting | asignación de formato |
| Formentera | Formentera |
| former | pasado |
| Former Chilean president Augusto Pinochet fingerprinted | La justicia chilena toma huellas y fotografías de Pinochet |
| Former FBI Second-In-Command says he was Deep Throat | Ex número dos del FBI es Garganta Profunda |
| former spouse | ex marido |
| Former Yugoslavian president Slobodan Milosevic dead | Muere el ex presidente yugoslavo Slobodan Milosevic |
| Former Yugoslavian president Slobodan Milosevic found dead in his cell | Muere el ex presidente yugoslavo Slobodan Milosevic |
| formerly | antaño |
| formfeed | horma |
| formic | fórmico |
| formic acid | ácido fórmico |
| Formic aldehyde | Formaldehído |
| Formica | de formica |
| Formicariidae | Formicariidae |
| Formicinae | Formicinae |
| formidability | enormidad |
| formidable | fecundo |
| Formidable class battleship | Clase Formidable |
| formidably | horrible |
| Formigal | Aramón Formigal |
| Formigas | Islotes de las Hormigas |
| forming | constitutivo |
| formless | informe |
| Formosa | Formosa |
| Formosa International Airport | Aeropuerto Internacional de Formosa |
| Formosa Province | Provincia de Formosa |
| Formosan languages | Lenguas formosianas |
| Formosan Rock Macaque | Macaca cyclopis |
| formula | esquema |
| Formula Nippon | Fórmula Nippon |
| Formula One | Fórmula Uno |
| Formula One Grand Prix | Grand Prix |
| formulate | expresar |
| formulation | redacción |
| Fornax | Fornax |
| Fornax Dwarf | Enana de Fornax |
| fornicate | fornicar |
| fornication | fornicación |
| Fornjot | Fornjót |
| Fornjót | Fornjót |
| Fornost Erain | Fornost |
| Forodwaith | Forochel |
| Forpus | Forpus |
| Forrest | Madera |
| Forrest Gump | Forrest Gump |
| Forro | forro |
| Forro language | Idioma forro |
| Fors de Bearn | Fors de Bearn |
| forsake | desertar |
| Forseti | Forseti |
| Forst | Forst |
| Forst an der Weinstraße | Forst |
| Forst-Längenbühl | Forst-Längenbühl |
| Forster | Forster |
| forswear | abjurar |
| Forsyth-Edwards Notation | Notación de Forsyth-Edwards |
| forsythia | forsythia |
