| swordsman | espadachim |
| sworn | jurado |
| SWOT analysis | Análise SWOT |
| Syagrius | Siágrio |
| Syagrus romanzoffiana | Jerivá |
| Syaoran Li | Li Shoran |
| Sybaris | Síbaris |
| sybarite | sibarita |
| sybarited So | sibaritaha |
| sybaritic | sibarítico |
| Syberia | Sibéria |
| sycamore | sicômoro |
| sycamore maple | sicômoro |
| Sychaeus | Sicheus |
| sycophant | bajulador |
| sycophant So | sicofantaa |
| Sycorax | Sycorax |
| Syd Barrett | Syd Barrett |
| Sydals | Sydals |
| Sydfalster | Sydfalster |
| Sydlangeland municipality | Sydlangeland |
| Sydney | Sydney |
| Sydney Brenner | Sydney Brenner |
| Sydney FC | Sydney FC |
| Sydney Football Stadium | Aussie Stadium |
| Sydney Harbour Bridge | Ponte da Baía de Sydney |
| Sydney Opera House | Ópera de Sydney |
| Sydney Pollack | Sydney Pollack |
| Sydney Smith | Sydney Smith |
| Sydney Tower | Torre de Sydney |
| Sydthy municipality | Sydthy |
| Syed Ahmed Khan | Syed Ahmed Khan |
| Syens | Syens |
| Sykes-Picot Agreement | Acordo Sykes-Picot |
| Sykkylven | Sykkylven |
| Sylhet | Divisão de Sylhet |
| Sylhet Division | Divisão de Sylhet |
| syllabary | silabário |
| syllabic | silábico |
| syllable | sílaba |
| Syllable rime | Rima |
| Syllable weight | Comprimento do arco |
| syllabub | bebida doce |
| syllabus | programa |
| syllabusn | apostilaoente |
| syllogism | silogismo |
| sylphte | sílfideha |
| Sylva River | Sylva |
| Sylvain Wiltord | Sylvain Wiltord |
| sylvan | silvestre |
| Sylvanus Morley | Sylvanus Griswold Morley |
| Sylvester | Silvestre |
| Sylvester Shyster | Lupus |
| Sylvester Stallone | Sylvester Stallone |
| Sylvia | Sylvia |
| Sylvia Kristel | Sylvia Kristel |
| Sylvia Pankhurst | Sylvia Pankhurst |
| Sylvia Plath | Sylvia Plath |
| Sylvinho | Sylvio Mendes Campos Junior |
| Symantec | Symantec |
| Symbian Ltd | SymbianOS |
| Symbian OS | SymbianOS |
| Symbionese Liberation Army | Exército Simbionês de Libertação |
| symbiosis | simbiose |
| symbol | sinal |
| symbolic | simbólico |
| Symbolic computation | Matemática simbólica |
| symbolically | simbolicamente |
| symbolism | simbolismo |
| symbolismvere | simbolismo |
| symbolize | representar |
| Symmachus | Papa Símaco |
| symmetric | simétrico |
| Symmetric multiprocessing | Multiprocessamento simétrico |
| Symmetric-key algorithm | Algoritmo de Chave-simétrica |
| symmetrical | simétrico |
| Symmetrical components | Componentes simétricas |
| symmetrical congenial | simétricoa |
| symmetry | simetria |
| symmetryal congenial | simetriaa |
| sympathetic | complacente |
| sympathetic nervous system | sistema nervoso simpático |
| sympathetical | solidário |
| sympatheticallyathic | empaticamente |
| sympatheticallygenial | simpaticamente |
| sympathies | condolência |
