| katenativ | catenative |
| katzenartig | feline |
| Kutenai | Kutenai |
| tentativ | tentative |
| ostentativ | ostentatious ostentation |
| alternativ | alternative |
| karminativ | carminative |
| konativ | conative |
| Iterativ | frequentative |
| iterativ | iterative |
| Kausativ | causative |
| karitativ | charitable caritative |
| kreativ | creative |
| Katechetin | catechist |
| Kattegatt | Kattegat |
| Katzenauge | cat's eye |
| Katzentür | cat flap |
| Katalanin | Catalan |
| Katana | katana |
| Kategorie | category |