| syndikalism | syndicalism |
| syndikat | syndicate |
| Syndikat -et | Syndicate |
| Syndikering | Web syndication |
| syndlös | sinless |
| syndrom | syndrome |
| synekologi | synecology |
| synergi | synergy |
| synergieffekt | synergy |
| Synestesi | Synesthesia |
| synfält | field of vision |
| synförmåga | sight |
| Syngman Rhee | Syngman Rhee |
| synhåll | sight |
| synkope | syncope |
| synkopera | syncopate |
| synkron | synchronous |
| Synkron digital hierarki | Synchronous optical networking |
| synkronisera | synchronize |
| synkroniserad | in sync |
| synkroniserad simning | synchronised swimming |
| synkroniserad växel | synchromesh |
| synkroniserar | synchronizes |
| synkronisering | synchronization |
| synkronklappa | clapperboard |
| Synkrotronstrålning | Synchrotron radiation |
| synlig | remarkable |
