| Gabelschlüssel | open end spanner |
| Maulschlüssel | open end spanner |
| Rollgabelschlüssel | adjustable wrench |
| Generalschlüssel | master key passe-partout passkey |
| Altschlüssel | alto clef |
| Bassschlüssel | F clef |
| Baßschlüssel | bass |
| Hauptschlüssel | master key |
| Hausschlüssel | housekey |
| Autoschlüssel | car key |
| Inbusschlüssel | Allen wrench |
| Notenschlüssel | clef |
| Bettschüssel | bedpan |
| Fremdschlüssel | foreign key |
| Funkschlüssel | fob |
| Gegenschluss | converse |
| Tenorschlüssel | tenor clef |
| aufschlüsseln | itemize |
| verschlüsselt | encrypted |
| Abschluss | exclusion degree graduation accounts acquisition deal |