| Klappbett | shakedown |
| Klappen | folding |
| klappen | fold work |
| klappbar | collapsible |
| klappe | cut |
| Klappe | flap mouth |
| Klapper | rattle |
| klappern | clatter click rattle |
| Knappheit | brevity closeness |
| Klapp- | folding |
| Klappentext | blurb |
| klapsen | fan |
| Klampe | cleat |
| Klappmütze | hooded seal |
| Klarheit | clearness |
| Klarinette | clarinet clarionet |
| Klartext | cleartext straight talk |
| klapprig | ramshackle rickety shaky tottery |
| klauben | collect sort out pick |
| plappern | babble |