| oktal | octal |
| Oktal- | octal |
| Oktant | Octans |
| Oktave | octave octonion Cayley algebra Cayley numbers |
| Oktole | octuplet |
| rektal | rectal |
| aortal | aortic |
| fötal | fetal |
| Metal | metal |
| Portal | portal gate gantry |
| Tael | tael |
| Tal | valley dale |
| fatal | fatal |
| fetal | fetal |
| letal | lethal deadly |
| total | total complete |
| vital | vital essential |
| Oktagon | octagon |
| Doktor | doctor physican |
| Oktaeder | octahedron |