| Silvia Farina Elia | Silvia Farina Elia |
| Silvia Saint | Silvia Saint |
| silviculture | sylviculture |
| Silvija Talaja | Silvija Talaja |
| Silvio Berlusconi | Silvio Berlusconi |
| Silvio Gesell | Silvio Gesell |
| Silvio Oddi | Silvio Oddi |
| Silvio Piola | Silvio Piola |
| Silvius Brabo | Silvius Brabo |
| SIM card | carte SIM |
| Sima Guang | Sīmǎ Guāng |
| Sima Qian | Sima Qian |
| Simargl | Simargl |
| Simaroubaceae | Simaroubaceae |
| Simat de la Valldigna | Simat de Valldigna |
| SIMBAD | Simbad |
| Simbelmynë | Flore de la Terre du Milieu |
| Simbirsk | Simbirsk |
| Simbu Province | Simbu |
| SimCity | SimCity |
| SimCity Societies | SimCity Societies |
| SimCopter | SimCopter |
| SIMD | Single Instruction Multiple Data |
| Simeiz | Simeiz |
| Simeiz Observatory | Observatoire de Simeiz |
| Simen Agdestein | Simen Agdestein |
| Simeon | Siméon |
| Simeon I of Bulgaria | Siméon Ier de Bulgarie |
| Simeon of Jerusalem | Siméon Ier de Jérusalem |
| Simeon of Moscow | Siméon Ier de Russie |
| Simeon Saxe-Coburg-Gotha | Siméon II de Bulgarie |
| Simeon Stylites | Siméon le Stylite |
| Simeon Uroš | Simeon Nemanjić |
| simethicone | siméthicone |
| Simeulue Regency | Simeulue |
| SimFarm | SimFarm |
| Simferopol | Simferopol |
| Simferopol International Airport | Simferopol |
| simian | simien |
| similar | pareil |
| Similar matrix | Matrice semblable |
| similarity | similarité |
| similarly | pareil |
| simile | comparaison |
| Simion Movilă | Simion Ier Movilă |
| Simitli | Simitli |
| Simlipal National Park | Parc national de Simlipal |
| Simlish | Simlish |
| SIMM | Single Inline Memory Module |
| Simmental | Fleckvieh |
| Simmental Cattle | Fleckvieh |
| simmer | cuire à feu doux |
