| Seneca | Seneca |
| Senegal | Sénégal River Senegal (Englisch) Senegal |
| Senker | plummet |
| Sensei | sensei |
| Sen | sen |
| Senat | senate |
| Sender | transmitter |
| Senf | mustard |
| Senfgas | mustard gas sulfur mustard |
| Senföl | mustard oil |
| Senior | senior citizen |
| senior | senior |
| Senium | senium |
| Senke | depression sink |
| Senkel | switchback aplomb |
| Sense | scythe |
| Sensor | sensor |
| Sentenz | maxim aphorism sentence adage axiom dictum |
| Usenet | usenet |
| senden | send broadcast |