| Funkschlüssel | fob |
| Zündschlüssel | ignition key |
| Autoschlüssel | car key |
| Türschlüssel | door key |
| Altschlüssel | alto clef |
| Bassschlüssel | F clef |
| Baßschlüssel | bass |
| Fremdschlüssel | foreign key |
| Hauptschlüssel | master key |
| Hausschlüssel | housekey |
| Rührschüssel | mixing bowl mortar |
| Tenorschlüssel | tenor clef |
| aufschlüsseln | itemize |
| unschlüssig | indecisive |
| C-Schlüssel | C-clef |
| Maulschlüssel | open end spanner |
| Schlüssel | key spanner wrench |
| entschlüsseln | decipher decode decrypt |
| Anschluß | Anschluss |
| Anschluss | connection connexion annexation |