| regenerativ | renewable |
| degenerativ | degenerative |
| Regeneration | regeneration |
| Degeneration | degeneration |
| Regentin | regent |
| regulativ | regulatory |
| Regulativ | regulation |
| vegetativ | vegetative |
| Generat | generator output |
| Generation | generation |
| Generator | generator |
| Renegatin | apostate |
| restaurativ | restorative |
| Rh-negativ | Rh negative |
| Regenrohr | drainpipe |
| Regentanz | rain dance |
| Regieraum | control room |
| Registrator | registrar |
| Regelkreis | closed loop control loop |
| Regenblase | rain bubble |