| Konvergenz | convergence |
| konvergent | convergent |
| Konferenz | conference |
| Konkurrenz | competition competitor |
| Konsequenz | consequence |
| Kontingenz | contingency attunement |
| konvenient | convenient |
| Divergenz | divergency divergence |
| Konkurrenz- | competitive |
| Kontingent | contingent |
| kontingent | contingent |
| Konvaleszenz | convalescence |
| Konvent | convent |
| Konvertit | convert |
| Konzertina | concertina |
| Kondolenz | condolence |
| Konfidenz | confidence trust |
| Kongruenz | agreement, concord congruity |
| Konkordanz | concordance |
| Konkurrent | competitor |