| SysOp | sysop |
| Sysop | sysop |
| Ysop | hyssop |
| Eisop | hyssop |
| Isop | hyssop |
| Äsop | Aesop |
| Systole | systole |
| System | system structure |
| Sopor | stupor |
| Lysosom | lysosome |
| Lysozym | lysozyme |
| systemlos | systemless unmethodical without a system |
| systemoid | systemoid |
| Isopren | isoprene |
| -sophie | -sophy |
| Sophia | Sophia Sophie Sophy |
| Sopran | soprano |
| Typsystem | type system |
| Exosystem | exosystem |
| IT-System | IT system |