| Soundsystem | sound system |
| Sonnensystem | solar system Solar System |
| Subsystem | subsystem |
| Tonsystem | pitch space |
| soundscape | soundscape |
| Soundkarte | sound card |
| Notensystem | stave |
| Immunsystem | immune system |
| Schulsystem | school system |
| Sternsystem | star system |
| Ökosystem | ecosystem |
| Soundso | so-and-so so and so such and such such-and-such |
| Youngster | youngster |
| Grundfeste | ground |
| Hunderstel | hundredth |
| Hundsstern | Dog Star Sirius |
| Atmungssystem | respiratory system |
| Dateisystem | file system |
| Typsystem | type system |
| Untersystem | sub-system |