| Knorpelfisch | cartilaginous fish |
| Knochenfisch | bony fish |
| knorpelig | cartilaginous |
| Norwegisch | Norwegian |
| norwegisch | Norwegian |
| anorektisch | anorectic |
| körperlich | bodily corporal corporeal material |
| Kuttelfisch | cuttlefish |
| Kugelfisch | balloonfish blowfish globefish puffer pufferfish swellfish |
| Kohlfisch | coalfish Spanish fly |
| Kohlenfisch | sablefish |
| Karelisch | Karelian |
| karelisch | Carelian |
| Koreanisch | Korean |
| koreanisch | Korean |
| Knöterich | knotweed |
| Knopfloch | buttonhole |
| Knorpel | cartilage gristle |
| nörglerisch | naggy |
| Nordsamisch | Northern Sami North Sami Northern Saami Northern Sámi |