| Odontologie | odontology |
| Deontologie | deontology |
| Ontologie | ontology |
| Parodontologie | periodontics |
| Ontologe | ontologist |
| Ontologin | ontologist |
| Gerontologie | gerontology |
| Erotologie | erotology |
| Onomatologie | onomastics |
| Motologie | motology |
| Neonatologie | neonatology |
| Oktologie | octology |
| Otologie | otology |
| Protologie | protology |
| Pönologie | penology |
| Doxologie | doxology |
| Onkologie | oncology |
| Phonologie | phonology |
| Önologie | oenology enology |
| Podologie | chiropody podiatry |