| Surrogatschlüssel | surrogate key |
| Salatschüssel | salad bowl |
| Primärschlüssel | primary key |
| Autoschlüssel | car key |
| Stromanschluss | electrical connection |
| Türschlüssel | door key |
| Analoganschluss | analog line |
| Altschlüssel | alto clef |
| Hauptschlüssel | master key |
| Zweitschlüssel | spare key |
| Fremdschlüssel | foreign key |
| Funkschlüssel | fob |
| Rührschüssel | mixing bowl mortar |
| Tenorschlüssel | tenor clef |
| Violinschlüssel | G clef |
| Zentralschlüssel | master key |
| Generalschlüssel | master key passe-partout passkey |
| Kreuzschlüssel | wheel brace |
| Notenschlüssel | clef |
| Schraubenschlüssel | wrench screw-wrench |