| rektal | rectal |
| Rektus | direct case |
| Rektor | rector principal |
| Rektum | rectum |
| erektil | erectile |
| Hektar | hectare |
| Nektar | nectar |
| Fraktal | fractal |
| fraktal | fractal |
| oktal | octal |
| Metal | metal |
| dental | dental |
| fetal | fetal |
| letal | lethal deadly |
| mental | mental |
| Reklame | advertisement |
| Rekord | record |
| Rekrut | recruit |
| Rektion | case government government |
| prekär | precarious tricky uneasy awkward embarrassing parlous really difficult |