| Rollator | walker walking frame rollator Zimmer frame |
| Rolladen | blind |
| Rollo | blind |
| Rollrate | roll rate |
| Roller | scooter kick scooter Harzer |
| Kollektor | collector |
| Dollar | dollar |
| Kollar | collar |
| Kollation | collating collation |
| Modulator | modulator |
| Emulator | emulator |
| Isolator | insulator |
| Donator | giver |
| Radiator | radiator |
| Rotor | rotor |
| Rollassel | pill bug |
| Rollback | rollback |
| Rollbahre | gurney |
| Rollbein | anklebone |
| Rollen | roll |
| rollen | roll |