| Radiologe | radiologist |
| Radiologie | radiology |
| Radiologin | radiologist |
| Kardiologe | cardiologist |
| Radiolarie | radiolarian |
| Radioröhre | thermionic valve |
| Radiosonde | radio altimeter |
| Radpolo | bicycle polo bike polo cycle polo |
| Audiologie | audiology |
| Kardiologie | cardiology |
| Abiologie | abiology |
| Axiologie | axiology |
| Biologe | biologist |
| Mariologie | Mariology |
| Soziologe | sociologist |
| Ätiologie | etiology aetiology |
| Garbologe | garbologist |
| Grafologe | graphologist |
| Graphologe | graphologist |
| Pathologe | pathologist |