| Esperantologin | Esperantologist |
| Esperantologie | Esperantology |
| Esperantologe | Esperantologist |
| Esperantistin | Esperantist |
| Speläologin | speleologist |
| Esperantid | Esperantido |
| Esperanto | Esperanto |
| Speläologie | speleology |
| Implantologie | implantology |
| Akzentologin | accentologist |
| Paläontologin | paleontologist |
| Scientologin | Scientologist |
| Gerontologie | gerontology |
| Herpetologin | herpetologist |
| Parasitologin | parasitologist |
| Proktologin | proctologist |
| Dermatologin | dermatologist |
| Eschatologie | eschatology |
| Japanologin | Japanologist |
| Phrenologin | phrenologist |