| Kryotron | cryotron |
| Krypton | krypton |
| krypto- | crypto- |
| Kyoto | Kyoto |
| myotrop | myotropic |
| Kryostase | cryostasis |
| Kryptide | cryptid |
| Krypta | crypt |
| Krypte | crypt |
| Kryptonit | Kryptonite |
| Kryptonym | cryptonym |
| kryophil | cryophilic |
| Karyotyp | karyotype |
| Ryokan | ryokan |
| Allotrop | allotrope |
| allotrop | allotropic |
| Zyklotron | cyclotron |
| Azeotrop | azeotrope |
| azeotrop | azeotropic |
| ionotrop | ionotropic |