| segling | boating |
| Segling vid Olympiska sommarspelen | Sailing at the Summer Olympics |
| segment | segment |
| segmentera | segment |
| segmentering | segmentation |
| Segmenteringsfel | Segmentation fault |
| Segni | Segni |
| Segovia | Segovia |
| segra | conquer |
| segrande | victorious |
| segrare | champion |
| segregation | segregation |
| Segunda División | Segunda División |
| Segura | Segura |
| Segway | Segway PT |
| SEI | Software Engineering Institute |
| Seiffen | Seiffen |
| Seigneux | Seigneux |
| Seiichi Ito | Seiichi Itō |
| Seiji Ozawa | Seiji Ozawa |
| Seikantunneln | Seikan Tunnel |
| Seimas | Seimas |
| Sein | Werden |
| Seine | Seine |
| Seine-et-Marne | Seine-et-Marne |
| Seine-Maritime | Seine-Maritime |
| Seine-Saint-Denis | Seine-Saint-Denis |
| Seinen | Seinen |
| Seinfeld | Seinfeld |
| Seinäjoki järnvägsstation | Seinäjoki railway station |
| seismisk | seismic |
| seismisk aktivitet | seismic activity |
| seismisk våg | tsunami |
| seismograf | seismograph |
| seismologi | seismology |
| Seismosaurus | Seismosaurus |
| Seiza | Seiza |
| Sejanus | Sejanus |
| sejdel | mug |
| Sejlflods kommun | Sejlflod |
| Sejmen | Sejm |
| Sejong den store | Sejong the Great of Joseon |
| sejval | sei whale |
| sekatör | pruning shears |
| sekel | century |
| Seker | Seker |
| Sekhmet | Sekhmet |
| Seki Shinsuke Kowa | Seki Kōwa |
| sekin | sequin |
| Sekiryo Yamauchi | Sekiryo Kaneda |
| Sekkuram | Seokguram |
| Seklerlandet | Székely Land |
| Sekondi-Takoradi | Sekondi-Takoradi |
| sekret | secretion |
| sekretariat | secretariat |
| sekreterar- | secretarial |
| sekreterare | clerk |
