| Radiowecker | clock radio |
| Radiometer | radiometer |
| Radiosender | radio broadcaster radio network station |
| Radiowelle | radio wave radio station |
| Radabweiser | guard stone |
| Radierer | eraser |
| Radikaler | radical |
| Radiochemie | radiochemistry |
| Radiolarie | radiolarian |
| Radiologe | radiologist |
| Radiotaste | radio button |
| Radmacher | wainwright |
| Radiermesser | eraser eraser knife steel eraser |
| Radieschen | radish |
| Radiologie | radiology |
| Radiorekorder | boom box |
| Radioröhre | thermionic valve |
| Radiosonde | radio altimeter |
| Radiotechnik | radio engineering |
| Radwechsel | wheel change |