| Klappfenster | fortochka |
| Klappmesser | jack-knife jackknife |
| Klappentext | blurb |
| Klapprechner | laptop |
| Kappensäger | merganser |
| Startfenster | slot |
| Dachfenster | skylight louver roof window roof-light |
| Klagender | wailer |
| Klappbett | shakedown |
| Klappen | folding |
| klappen | fold work |
| Klappenloch | glory hole |
| Klapperkiste | jalopy |
| Klafter | fathom |
| Klapper | rattle |
| Klapperstorch | White Stork |
| Klappspaten | entrenching tool |
| Lappenente | musk duck |
| Wappentier | heraldic animal |
| zappenduster | pitch black |