| Oktateuch | octateuch |
| Pentateuch | Pentateuch |
| Oktaeder | octahedron |
| Oktave | octave octonion Cayley algebra Cayley numbers |
| ekstatisch | ecstatic |
| statisch | static statical |
| tätlich | violent |
| Bettuch | prayer shawl |
| Fattouch | fattouch |
| Betttuch | bed sheet |
| Käsetuch | cheese cloth |
| Putztuch | cloth |
| Tagebuch | diary log journal |
| Oktagon | octagon |
| Oktal- | octal |
| Oktant | Octans |
| Oktanzahl | octane rating |
| Oktett | octet |
| Oktober | October |
| Oktole | octuplet |