| sekunder | seconds |
| sekundvisare | second hand |
| sekundär | insignificant |
| sekundärundervisning | secondary education |
| sekvele | sequela |
| sekvens | sequence |
| sekvestrera | sequestrate |
| Sel kommun | Sel |
| sela på | harness |
| Selbu kommun | Selbu |
| Seldjuk | Seljuk |
| Seldjuker | Seljuq dynasty |
| seldon | collar |
| sele | harness |
| Selegilin | Selegiline |
| selektiv | selective |
| Selektiva serotoninåterupptagshämmare | Selective serotonin reuptake inhibitor |
| selektivitet | selectivity |
| selektivt | selectively |
| selen | selenium |
| Selena | Selena |
| Selena Quintanilla | Selena |
| Selene | Selene |
| Selenga | Selenge River |
| Selenge | Selenge Province |
| selenologi | selenology |
| Seleukiderna | Seleucid Empire |
| Seleukos | Seleucus |
| Seleukos I | Seleucus I Nicator |
| Seleukos II | Seleucus II Callinicus |
| Seleukos III | Seleucus III Ceraunus |
| Seleukos IV | Seleucus IV Philopator |
| Seleukos V | Seleucus V Philometor |
| Seleukos VI | Seleucus VI Epiphanes |
| selfie | selfie |
| selfmademan | self-made man |
| Selfoss | Selfoss |
| Selim I | Selim I |
| Selim II | Selim II |
| Selimiyemoskén | Selimiye Mosque |
| Selinunte | Selinunte |
| Selinus | Selinunte |
| Selje kommun | Selje |
| Selkupiska | Selkup language |
| Sellafield | Sellafield |
| Selle français | Selle Français |
| selleri | celery |
| Sello | Sello |
| Sellye | Sellye |
| Selma | Selma |
| Selma Björnsdóttir | Selma Björnsdóttir |
| Selma Lagerlöf | Selma Lagerlöf |
| Selous viltreservat | Selous Game Reserve |
| Seltjarnarnes | Seltjarnarnes |
| Selvagensöarna | Savage Islands |
| Sem | Shem |
| semafor | semaphore |
| semantik | semantics |
