| Konsequenz | consequence |
| konsequent | consequential forceful |
| Konferenz | conference |
| Konsistenz | consistency |
| Konvergenz | convergence |
| Sequenz | sequence |
| Kondolenz | condolence |
| Konfidenz | confidence trust |
| Konfluenz | confluence |
| Kongruenz | agreement, concord congruity |
| Konkurrenz | competition competitor |
| Konsens | consensus consent |
| Konserve | preserve |
| Konstanz | constancy Constance |
| Konsument | consumer |
| Kontingenz | contingency attunement |
| konsekutiv | consecutive |
| konsistent | consistent |
| konvenient | convenient |
| konvergent | convergent |