| Speläologie | speleology |
| Speleologie | speleology |
| Speläologe | speleologist |
| Speläologin | speleologist |
| Petrologie | petrology |
| Selenologie | selenology |
| Sexologie | sexology |
| Sexuologie | sexology |
| Keltologie | Celtic studies |
| Pedologie | pedology |
| Pulmologie | pneumology pulmonology |
| Senologie | senology |
| Teleologie | teleology |
| Esperantologie | Esperantology |
| Pelargonie | geranium |
| Archäologie | archaeology archeology |
| Matäologie | mateology |
| Areologie | areology |
| Aretologie | aretology |
| Nephologie | nephology |