| Konkupiszenz | concupiscence |
| Konvaleszenz | convalescence |
| Konkurrenz | competition competitor |
| Konsistenz | consistency |
| Konkurrenz- | competitive |
| Konfidenz | confidence trust |
| Konkubine | concubine |
| Konkurrent | competitor |
| Konkussion | concussion |
| Kontingenz | contingency attunement |
| konjugieren | conjugate |
| konkludieren | conclude |
| konkurrieren | compete vie |
| konsistent | consistent |
| konsumieren | consume |
| konturieren | outline |
| konzipieren | design plan conceptualise prepare a draft conceive become pregnant get pregnant teem |
| okkupieren | occupy |
| Koaleszenz | coalescence |
| Koexistenz | coexistence |