| foundation | base |
| Foundation and Earth | Foundation and Earth |
| Foundation and Empire | Foundation and Empire |
| Foundation series | Foundation |
| foundationalism | fundacionalismo |
| foundationalismral | fundacionalismo |
| foundationalist | fundacionista |
| foundations | alicerce |
| Foundations of mathematics | Fundações da matemática |
| foundationt | modelador(cinta) |
| founded | fundado |
| founder | fundador |
| Founder effect | Efeito fundador |
| founding | fundação |
| Founding of Rome | Fundação de Roma |
| Foundiougne | Foundiougne |
| foundling | abandonado |
| foundry | fundição |
| Founex | Founex |
| fount | fonte |
| fountain | fonte |
| Fountain of Youth | Fonte da juventude |
| fountain pen | caneta |
| Fountains in Rome | Lista de fontes de Roma |
| Fountains of Wayne | Fountains of Wayne |
| fountainy | fonteesa |
| four | quatro |
| Four Asian Tigers | Tigres asiáticos |
| Four bar linkage | Mecanismo de quatro barras |
| Four bombs rock London | Londres é vítima de ataque terrorista |
| Four color theorem | Teorema das quatro cores |
| Four Corners | Four Corners |
| Four Corners Monument | Four Corners |
| Four fours | Os quatro quatros |
| Four Hitokiri of the Bakumatsu | Hitokiri |
| Four Horsemen of the Apocalypse | quatro Cavaleiros do Apocalipse |
| Four humours | Teoria humoral |
| four hundred | quatrocentos |
| Four Knights Game | Abertura dos Quatro Cavalos |
| Four Noble Truths | Quatro Nobres Verdades |
| four o'clock | quatro horas |
| four of a kind | quadra |
| Four on the Floor | Four on the Floor |
| Four Rooms | Four Rooms |
| Four Seasons | Le quattro stagioni |
| Four sons of Horus | Filhos de Hórus |
| four stroke engine | motores a quatro tempos |
| Four Temperaments | Teoria humoral |
| four thousand | quatro |
| four times as much | quádruplo |
| Four-character idiom | Provérbios chineses |
| Four-color process | CMYK |
| four-cornered | quadrangular |
| four-dimensional | quadridimensional |
| four-engined | quadrimotor |
| Four-eyed fish | Anablepidae |
| four-eyes | quatro olhos |
| four-footed | quadrúpede |
| four-in-hand | carruagem puxada a quatro cavalos |
| Four-in-hand knot | Nó americano |
| four-lane highway | auto-estrada de quatro pistas |
| four-leaf clover | trevo de quatro folhas |
| four-legged | quadrúpede |
| four-o-four (slang) | objeto esquecido (gíria) |
| four-poster | cama de quatro colunas |
| four-poster bed | cama de quatro colunas |
| four-speed gear | câmbio de quatro velocidades |
| four-stroke engine | motor a quatro tempos |
| Four-toed salamander | Hemidactylium |
| four-wheel | de quatro rodas |
| four-wheel drive | tração nas quatro rodas |
| four-wheeler | veículo de quatro rodas |
| Fourier | Fourier |
| Fourier analysis | Análise harmónica |
| Fourier optics | Óptica de Fourier |
| Fourier series | Série de Fourier |
| Fourier transform | Transformada de Fourier |
| fourpple | quatro |
| foursome | quarteto |
| foursquare | decisivamente |
| fourteen | quatorze |
| fourteen days | quinzena |
| Fourteen Points | Quatorze Pontos |
| fourteenth | décimo-quarto |
| Fourteenth Council of Toledo | Décimo-quarto Concílio de Toledo |
| Fourteenth dynasty of Egypt | XIV dinastia egípcia |
| fourth | quinto |
| Fourth Age | Quarta Era |
| Fourth Council of the Lateran | Quarto Concílio de Latrão |
| Fourth Crusade | Quarta Cruzada |
| Fourth dynasty of Egypt | IV dinastia egípcia |
| fourth grade | quarta série |
| Fourth International | IV Internacional |
| fourth stomach | quarto estômago |
| Fourth World | Quarto Mundo |
| Fourth-generation programming language | Linguagem de programação de quarta geração |
| fourthle | quarto(a) |
| Fourvière | Fourvière |
| fowl | galinha |
| fowling | caça de aves |
| fox | raposa |
| Fox Broadcasting Company | Fox Broadcasting Company |
| Fox Glacier | Glaciar Fox |
| fox hunt | caça de raposa |
| Fox Life | Fox Life |
| Fox Mulder | Fox Mulder |
| Fox News Channel | Fox News |
| Fox sisters | Irmãs Fox |
| fox terrier | fox-terrier |
| fox trot | foxtrote |
| fox-trot | foxtrote |
| foxear | raposar |
| foxglove | digital |
| foxhound | foxhound |
| Foxtail Pine | Pinus balfouriana |
| foxy | astutoe |
| foyer | saguão |
| Foza | Foza |
| FPGA | FPGA |
| Fr | Frâncio |
| Fra Angelico | Fra Angelico |
| Fra Bartolomeo | Fra Bartolommeo |
| fracas | rixa |
