| optimal | optimal optimum |
| Optimat | optimate |
| Optimum | optimum |
| optional | optional |
| Optik | optics |
| Optiker | optician |
| Optimatin | optimate |
| Optimist | optimist |
| Option | option |
| optisch | optic optical |
| suboptimal | suboptimal |
| Primas | primacy |
| Primat | primate primacy |
| dezimal | decimal |
| dreimal | thrice three times |
| maximal | maximal maximum |
| minimal | minimal |
| prima | super |
| primär | primary |
| zweimal | twice |