| Konferenz | conference |
| Konferenzraum | meeting room |
| Konferenzsaal | meeting room |
| Konfidenz | confidence trust |
| Konvergenz | convergence |
| Inferenz | inference |
| Webkonferenz | web conference |
| Kondolenz | condolence |
| Konfluenz | confluence |
| Kongruenz | agreement, concord congruity |
| Konifere | conifer conifers |
| Konkurrenz | competition competitor |
| Konsequenz | consequence |
| Konzern | group combine concern trust |
| kontern | counter |
| konvergent | convergent |
| Differenz | difference remainder |
| Kupfererz | copper ore |
| Präferenz | preference |
| Referenz | reference |