| Röntgenologie | radiology |
| Röntgenologe | radiologist |
| Röntgenologin | radiologist |
| Röntgenröhre | X-ray tube |
| Ontologie | ontology |
| Angelologie | angelology |
| Osteologie | osteology |
| Ponerologie | ponerology |
| Röntgenblick | X-ray vision |
| Röntgenographie | radiography |
| Gerontologie | gerontology |
| Ontologe | ontologist |
| Ontologin | ontologist |
| Deontologie | deontology |
| Odontologie | odontology |
| Phrenologie | phrenology |
| Selenologie | selenology |
| Lichenologie | lichenology |
| Phänomenologie | phenomenology |
| Senologie | senology |