| silver wedding | sølvbryllup |
| silver-grey | sølvgrå |
| Silver-spotted Skipper | Kommabredpande |
| Silver-studded Blue | Argusblåfugl |
| Silver-washed Fritillary | Kejserkåbe |
| silverfish | sølvfisk |
| silversmith | sølvsmed |
| silverweed | gåsepotentil |
| Silvery Gibbon | Sølvgibbon |
| Silvia | Sylvia |
| Silvia Saint | Sylvia Saint |
| Silvio Berlusconi | Silvio Berlusconi |
| Silvía Night | Silvia Night |
| SIM lock | Simlås |
| Simargl | Semargl |
| Simaroubaceae | Kvassia-familien |
| Simchat Torah | Sukkot |
| SimCity | SimCity |
| Simeon Saxe-Coburg-Gotha | Simeon Sachsen-Coburg-Gotha |
| Simeulue Regency | Simeulue |
| Simferopol | Simferopol |
| similar | lignende |
| similarity | lighed |
| simile | sammenligning |
| Simlish | Simlish |
| Simon | Simon |
| Simon Boccanegra | Simon Boccanegra |
| Simon Le Bon | Simon Le Bon |
| Simon of Cyrene | Simon af Kyrene |
| Simon Wiesenthal | Simon Wiesenthal |
| Simone | Simone |
| Simone Boccanegra | Simon Boccanegra |
| Simone de Beauvoir | Simone de Beauvoir |
| Simone Martini | Simone Martini |
| Simone Signoret | Simone Signoret |
| Simonopetra monastery | Peterskirken |
| simony | simoni |
| simple | enkelt |
| simple past | præteritum |
| Simple Plan | Simple Plan |
| Simplicial complex | Kompleks |
| Simplicius Simplicissimus | Simplicius Simplicissimus |
| simplified | forenklet |
| Simplified Chinese | forenklet kinesisk |
| Simplified Chinese character | Simplificeret kinesisk |
| Simplified Latin | interlingua |
| simply connected | enkeltsammenhængende |
| Simpson family | Bart Simpson |
| Simrishamn | Simrishamn |
| Simrishamn Municipality | Simrishamn |
| simulation | simulering |
| Simulation game | Simulationsspil |
| simultaneously | samtidigt |
| Simón Bolívar | Simón Bolívar |
| sin | synd |
| Sin City | Sin City |
| Sinai | Sinai-halvøen |
| Sinai Peninsula | Sinai-halvøen |
| Sinaloa | Sinaloa |
| Sinaloa de Leyva | Sinaloa |
| Sinan | Sinan |
| Sinanthropus | Sinanthropus pekinensis |
| Sinapis | Sennep-slægten |
| Sinapis arvensis | Ager-Sennep |
| Sinatra Doctrine | Sinatradoktrinen |
| Sinbad and the Eye of the Tiger | Sinbad og tigerens øje |
| Sinbad the Sailor | Sinbad |
| since | på |
| Sind | Sindh |
| Sindal | Sindal Kommune |
| Sindarin | Sindarin |
| Sindh | Sindh |
| Sindhi | sindhi |
| Sindhuli District | Sindhuli District |
| Sindhulpalchok District | Sindhupalchok District |
| sine | sinus |
| sine qua non | absolut nødvendighed |
| sinecure | sinecure |
| sing | synge |
