| korpulent | corpulent portly |
| Korpulenz | corpulence |
| opulent | opulent |
| Opulenz | opulence |
| kraulen | crawl do the crawl |
| purulent | purulent |
| turbulent | turbulent tumultuous |
| virulent | virulent |
| kovalent | covalent |
| Konsument | consumer |
| kompetent | competent |
| Korund | corundum |
| Körnchen | grain |
| koralle | coral |
| Koralle | coral |
| Korduan | cordovan |
| Korken | plug stopper |
| Kornett | cornet |
| Korolle | corolla |
| Korpus | corpus body base |