| Radiointerview | radio interview |
| Interview | interview |
| Radiochemie | radiochemistry |
| Radiolarie | radiolarian |
| Radiometer | radiometer |
| Radiotherapie | radiotherapy |
| radizieren | square root |
| Radierer | eraser |
| Radio Eriwan | Radio Yerevan |
| Radiographie | radiography |
| Radionuklid | radionuclide |
| Radiotaste | radio button |
| Bradykinesie | bradykinesia |
| Radioaktivität | radioactivity |
| Radiologie | radiology |
| Radiorekorder | boom box |
| Radioröhre | thermionic valve |
| Radiosender | radio broadcaster radio network station |
| Radiotechnik | radio engineering |
| Radiotelegrafie | radiotelegraphy |