| Radiotaste | radio button |
| Radiolarie | radiolarian |
| Radikale | radical |
| Radiologe | radiologist |
| Radiant | radian radiant |
| Radiologie | radiology |
| Radiometer | radiometer |
| Radioröhre | thermionic valve |
| Radiosonde | radio altimeter |
| Radiowelle | radio wave radio station |
| Radkasten | wheel housing |
| radioaktiv | radioactive |
| Alt-Taste | alt key |
| Pfeiltaste | arrow key |
| Rücktaste | backspace |
| Radikaler | radical |
| Radiochemie | radiochemistry |
| Radiographie | radiography |
| Radioisotop | radioisotope |
| Radkappe | hubcap |