| Kongruenz | agreement, concord congruity |
| Konfluenz | confluence |
| kongruent | congruent |
| Inkongruenz | incongruity |
| Konvent | convent |
| Können | competence ability |
| können | can be able to may be allowed to know |
| konfus | confused |
| konfuse | confuse |
| Kongo | Congo Kongo |
| Konkani | Konkani |
| Konkurs | bankruptcy |
| Konsens | consensus consent |
| Konstanz | constancy Constance |
| Konsul | consul |
| Konsum | consumption |
| Kontur | contour outline |
| Königin | queen |
| konfluent | confluent |
| Krongut | Crown land |