| konform | compliant conformable |
| Konformist | conformist |
| Konformität | conformity |
| Konformismus | conformism |
| Kontor | office |
| Kondom | condom rubber |
| Kondor | condor |
| Konformation | conformation |
| Vorform | antecedent |
| Komfort | comfort |
| Koseform | affectionate form familiar form |
| Konfekt | candy |
| Konoid | conoid |
| konfus | confused |
| konfuse | confuse |
| Kongo | Congo Kongo |
| Konifere | conifer conifers |
| Konkurs | bankruptcy |
| Konsole | console |
| Konsorte | consortium member |