| Radiolarie | radiolarian |
| Radiologie | radiology |
| Radiologe | radiologist |
| Radiotaste | radio button |
| Radiologin | radiologist |
| Idiolatrie | idiolatry |
| Mariolatrie | Mariolatry |
| Radikale | radical |
| Radiochemie | radiochemistry |
| Radiographie | radiography |
| Radlerin | cyclist |
| Radioröhre | thermionic valve |
| Radiosonde | radio altimeter |
| Radiowelle | radio wave radio station |
| radioaktiv | radioactive |
| Pädiatrie | pediatrics paediatrics |
| Audiologie | audiology |
| Dioptrie | diopter dioptre |
| Kardiologie | cardiology |
| Abiologie | abiology |