| Konsortium | consortium |
| Konsorte | consortium member |
| Kondominium | condominium |
| Konformist | conformist |
| Konsumtion | consumption |
| Kontorsion | contortion |
| Konvertit | convert |
| Konzertina | concertina |
| Konkretum | concrete noun |
| Konsum | consumption |
| Königtum | monarchy |
| konform | compliant conformable |
| Monstrum | monster |
| Kolporteur | colporter colporteur |
| Gorstium | Gorstian |
| Solstitium | solstice |
| Kungurium | Kungurian |
| Ossarium | ossuary |
| Kollodium | collodion |
| Kolloquium | colloquium examination symposium test |