| Osteologie | osteology |
| Osteologin | osteologist |
| Osteologe | osteologist |
| Astrologie | astrology |
| Oktologie | octology |
| Ontologie | ontology |
| Otologie | otology |
| Osteopenie | osteopenia |
| Areologie | areology |
| Geologie | geology |
| Ideologie | ideology |
| Rheologie | rheology |
| Teleologie | teleology |
| Theologie | theology |
| Antrologie | arthrology |
| Ontologe | ontologist |
| Ontologin | ontologist |
| Oologie | oology |
| Petrologie | petrology |
| Sexologie | sexology |