| Radikand | radicand |
| Radikale | radical |
| Radstand | wheelbase |
| Radiant | radian radiant |
| Radikal | radical |
| radikal | radical |
| Radikaler | radical |
| Prädikat | predicate |
| radial | radial radially |
| Rikard | Richard |
| Trafikant | tobacconist |
| Vatikan | Vatican Vatican City |
| Mailand | Milan |
| Rada | rada |
| Radierer | eraser |
| Radierung | etching |
| Radix | primitive |
| Radkappe | hubcap |
| Radnabe | hub |
| Radsatz | wheelset |