| Esperantologie | Esperantology |
| Esperantologe | Esperantologist |
| Esperantologin | Esperantologist |
| Speläologie | speleology |
| Implantologie | implantology |
| Gerontologie | gerontology |
| Eschatologie | eschatology |
| Esperantistin | Esperantist |
| Esperantid | Esperantido |
| Esperanto | Esperanto |
| Speleologie | speleology |
| Speläologe | speleologist |
| Speläologin | speleologist |
| Akzentologie | accentology |
| Deontologie | deontology |
| Paläontologie | paleontology palaeontology |
| Erotologie | erotology |
| Planktologie | planktology |
| Dermatologie | dermatology |
| Herpetologie | herpetology |