| singularly | extremamente |
| singulative | singulativo |
| Sinhalese | cingalés |
| Sinhalese language | Idioma cingalés |
| sinicization | sinización |
| sinicize | achinar |
| sinister | siniestro |
| Sinister Six | Seis Siniestros |
| sinisterness | aspecto siniestro |
| Sinitic | sinítico |
| Siniša Mihajlović | Siniša Mihajlović |
| sink | bajar |
| sink hole | cenote |
| sink in | dejar una profunda huella |
| sink into oblivion | ser totalmente olvidado |
| Sink trap | Sifon |
| Sink-hole | Cueva |
| sinker | plomo |
| sinking | hundimiento |
| Sinking funds | Fondo común de inversión |
| Sinking of Prince of Wales and Repulse | Hundimiento del HMS Prince of Wales y del HMS Repulse |
| sinless | puro |
| Sinn Féin | Sinn Féin |
| sinner | pecador |
| Sinningia | Sinningia |
| Sinnoh | Sinnoh |
| Sino- | chino- |
| Sino-French War | Guerra Franco-China |
| Sino-Japanese War | Guerra Sino-Japonesa |
| Sino-Soviet border conflict | Conflicto de la frontera chino-soviética |
| Sino-Soviet split | Ruptura Sino-Soviética |
| Sino-Tibetan languages | Lenguas sino-tibetanas |
| sinologist | sinólogo |
| sinology | sinología |
| Sinon | Sinón |
| Sinop | Sinop |
| Sinop Province | Provincia de Sinop |
| Sinope | Sinop |
| Sinophobia | sinofobia |
| Sinophone | sinófono |
| Sinornithosaurus | Sinornithosaurus |
| Sinosauropteryx | Sinosauropteryx |
| Sinosaurus | Sinosaurus |
| Sinotherium | Sinotherium |
| SINPO | SINPO |
| Sinraptor | Sinraptor |
| Sinraptoridae | Sinraptoridae |
| Sint Eustatius | Sint Eustatius |
| Sint Maarten | Isla de San Martín |
| Sint Maarten national football team | Selección de fútbol de Sint Maarten |
| Sint-Agatha-Berchem | Berchem-Sainte-Agathe |
| Sint-Jans-Molenbeek | Molenbeek-Saint-Jean |
| Sint-Katelijne-Waver | Sint Katelijne Waver |
| Sint-Laureins | Saint-Laurent |
| Sint-Niklaas | Fiesta de San Nicolás |
| sinter | sinterizar |
