| Kastrat | castrato |
| Kastration | castration |
| Kasra | kasra |
| Astat | astatine |
| astral | astral |
| gastral | gastric stomachal stomachic |
| Adstrat | adstratum |
| Tartrat | tartrate |
| Karat | carat karat |
| Kasarka | shelduck |
| Kascha | kasha |
| Kaschau | Kosice |
| Kaser | cheesemaker |
| Käser | cheesemaker |
| Kaserin | cheesemaker |
| Kaspar | Caspar |
| Käserei | cheesemaking |
| Kasan | Kazan |
| Kasbah | casbah kasbah |
| Kaschrut | kashrut |