| Kongolese | Congolese |
| Kongolesin | Congolese |
| Kondolenz | condolence |
| Kongress | congress convention |
| Konsole | console |
| Mongole | Mongolian Mongol |
| Mongolei | Mongolia |
| Kantonese | Cantonese |
| Konfutse | Confucius |
| Königsmeise | yellow-cheeked tit |
| konfuse | confuse |
| Kongo | Congo Kongo |
| Konifere | conifer conifers |
| Konklave | conclave |
| Konsommee | consomme |
| Konsorte | consortium member |
| Kontrolle | inspection control |
| Kontroverse | controversy dispute |
| Konvolut | envelope |
| kondolieren | condole |