| Serpent | serpent |
| Serpentin | serpentine |
| Serpentinit | serpentinite |
| serpens | advancing creeping serpent-like serpiginous |
| Serien- | serial |
| Terpen | terpene |
| verpönt | frowned upon |
| Perzent | percent |
| Ferment | enzyme |
| Segment | segment |
| Sorrent | Sorrento |
| Sergei | Sergey |
| Serie A | Serie A |
| Inserent | advertiser |
| Serbe | Serb |
| Serbien | Serbia |
| Serbin | Serb |
| Sergej | Sergey |
| Serie | series |
| Serin | serine |