| Cotonou | Cotonou |
| Sotolon | sotolon |
| autonom | autonomous self-governed |
| Mononom | monomial |
| Ökonom | economist |
| Cottage | cottage |
| Cottbus | Cottbus |
| Isoton | isotone |
| Ökoton | ecotone |
| Foto | photo picture photography |
| Koto | koto |
| Lotos | lotos |
| Motor | engine motor |
| Motorik | motor skill |
| Myotonie | myotonia |
| Notogäa | Notogaea Notogea |
| Otoskop | otoscope |
| Photon | photon |
| Proton | proton |
| Protonym | protonym |