| Klopfgeist | poltergeist |
| Kampfgeist | fight |
| Kleingeist | small-minded person |
| Klopfen | knock |
| klopfen | knock beat tap thump |
| Klopfer | door knocker carpet beater |
| Kopfzeile | header |
| Kopfgeld | bounty |
| Kopfgrind | scurf |
| Luftgeist | sylph |
| Plagegeist | tormentor |
| Kopist | copyist |
| Klopfbank | hammer bench |
| Klopfholz | mallet |
| Kloset | toilet |
| Klosett | toilet |
| Klopapier | loo paper toilet paper |
| Kloppe | a kind of |
| Klops | meatball howler |
| Klöppel | clapper lace bobbin |