| Optimatin | optimate |
| Optimistin | optimist |
| Optimat | optimate |
| Optikerin | optician |
| Optativ | optative optative mood |
| optimal | optimal optimum |
| ultimativ | ultimate |
| Optimum | optimum |
| Optometrie | optometry |
| Optimist | optimist |
| Option | option |
| optieren | opt |
| optimieren | optimize |
| Baptistin | Baptist |
| Septimanien | Septimania |
| Ultimatum | ultimatum |
| privatim | privately in private |
| Himation | himation |
| Animation | animation |
| Primat | primate primacy |