| Ornithologe | ornithologist |
| Ornithologie | ornithology |
| Ornithologin | ornithologist |
| Ornithose | ornithosis |
| Ontologe | ontologist |
| Ornithopter | ornithopter |
| Paläornithologe | paleornithologist |
| Ornithochorie | ornithochory |
| ornithologisch | ornithological ornithologic |
| Pathologe | pathologist |
| Anthologie | anthology |
| Ethologe | ethologist behavior scientist |
| Mythologe | mythologist mythologer |
| Graphologe | graphologist |
| Oneirologe | oneirologist |
| Kryptologe | cryptologist |
| Onkologe | oncologist |
| Ontologie | ontology |
| Osteologe | osteologist |
| Politologe | political scientist |