| Orchideologie | orchidology |
| Orchidologie | orchidology |
| Archäologie | archaeology archeology |
| Ideologie | ideology |
| Rheologie | rheology |
| Cecidologie | cecidology |
| Ophiologie | ophiology |
| Ornithologie | ornithology |
| Orchidee | orchid |
| Archäologin | archaeologist |
| Archäologe | archaeologist archeologist |
| Ideologin | ideologue |
| Ideologe | ideologist |
| Areologie | areology |
| Osteologie | osteology |
| Theologie | theology |
| Hethitologie | Hittitology |
| Oneirologie | oneirology |
| Pyramidologie | pyramidology |
| Aerobiologie | aerobiology |