| Östrogen | estrogen oestrogen œstrogen |
| strohen | strawen |
| strömen | stream |
| iatrogen | iatrogenic |
| Ostfalen | Eastphalia |
| Ostasien | East Asia Eastern Asia |
| Osten | east |
| Ostgote | Ostrogoth |
| Streben | bid |
| streben | strive |
| stromern | wander |
| Estragon | tarragon dragon's-wort |
| Istrien | Istria |
| Strobe | white pine |
| austragen | deliver distribute settle gestate carry to term deregister |
| strafen | punish |
| streuen | scatter |
| strängen | harness |
| Tropen | tropics |
| Hydrogen | hydrogen |