| Radkappe | hubcap |
| Graukappe | birch bolete |
| Badekappe | bathing-cap swimming cap |
| Radikale | radical |
| Radkralle | wheel clamp |
| Radnabe | hub |
| Radkasten | wheel housing |
| Kappe | cap |
| Rappe | black |
| Rada | rada |
| Radarkuppel | radar dome |
| Radikaler | radical |
| Radklopfer | wheeltapper |
| Radmacher | wainwright |
| Radsatz | wheelset |
| Radar | radar |
| Radau | racket |
| Radball | cycle ball radball |
| Radfahren | cycling |
| Radfahrer | biker cyclist |