| Röntgenologin | radiologist |
| Röntgenologie | radiology |
| Röntgenologe | radiologist |
| Ontologin | ontologist |
| Osteologin | osteologist |
| Röntgenblick | X-ray vision |
| Röntgenröhre | X-ray tube |
| Ontologie | ontology |
| Phrenologin | phrenologist |
| Selenologin | selenologist |
| Ethnologin | ethnologist |
| Molinologin | molinologist |
| Önologin | oenologist |
| Entomologin | entomologist |
| Kosmetologin | cosmetologist |
| Oneirologin | oneirologist |
| Onkologin | oncologist |
| Onomatologin | onomastician |
| Proktologin | proctologist |
| Angelologie | angelology |