| Kryptide | cryptid |
| Krypte | crypt |
| Karyatide | caryatid |
| Kryptojude | crypto-Jew |
| Krypta | crypt |
| Krypton | krypton |
| kryptisch | cryptic concealed cryptical hidden secret |
| krypto- | crypto- |
| Nipptide | neap |
| Kreide | chalk Cretaceous crayon debt |
| Kryostase | cryostasis |
| Kryotron | cryotron |
| Kryptogame | cryptogam |
| Kryptologe | cryptologist |
| Kryptonit | Kryptonite |
| Kryptonym | cryptonym |
| kryophil | cryophilic |
| Koptin | Copt |
| Septime | seventh |
| eruptiv | igneous eruptive |