| Radiowelle | radio wave radio station |
| Radiowecker | clock radio |
| rationell | economic |
| Radikale | radical |
| Radiochemie | radiochemistry |
| Radiolarie | radiolarian |
| Radiologe | radiologist |
| Radiotaste | radio button |
| Radkralle | wheel clamp |
| Radiologie | radiology |
| Radiometer | radiometer |
| Radioröhre | thermionic valve |
| Radiosender | radio broadcaster radio network station |
| Radiosonde | radio altimeter |
| Mikrowelle | microwave microwave oven |
| Bodenwelle | bump |
| Kardanwelle | cardan shaft |
| Kältewelle | cold snap |
| Zapfwelle | PTO |
| Dauerwelle | perm permanent wave cold-perm |