| Ikonostase | iconostasis |
| Ikonoklast | iconoclast |
| Kryostase | cryostasis |
| Ikonografie | iconography |
| Ikonolatrie | iconolatry |
| Ikonismus | iconism |
| Ikonodulie | iconodulism iconoduly |
| Konfutse | Confucius |
| Konstanze | Constance |
| Konstante | constant |
| Konstanz | constancy Constance |
| konstant | constant constantly |
| Ionosphäre | ionosphere |
| Hämostase | coagulation |
| Homöostase | homeostasis homoeostasis homœostasi |
| Hypostase | hypostase |
| Ekstase | ecstasy |
| Kokosfaser | coir |
| ikonenhaft | iconic |
| Ikone | icon |