| Radiorekorder | boom box |
| Videorekorder | video recorder video cassette recorder |
| Radiosender | radio broadcaster radio network station |
| Radierer | eraser |
| Radiometer | radiometer |
| Radioröhre | thermionic valve |
| Radiosonde | radio altimeter |
| Radiowecker | clock radio |
| Rekorder | recorder |
| Paradieskörner | grains of paradise |
| Radikaler | radical |
| Radioempfänger | radio |
| Radiolarie | radiolarian |
| Radiologe | radiologist |
| Radionuklid | radionuclide |
| Radiermesser | eraser eraser knife steel eraser |
| Radiologie | radiology |
| Radiowelle | radio wave radio station |
| radieren | delete erase to rub out drypoint etch |
| radizieren | square root |