| Regieraum | control room |
| Reinraum | clean room cleanroom |
| regierbar | governable |
| Regierung | government administration |
| regieren | govern reign |
| Leseraum | reading room |
| geraum | some time |
| Freiraum | leeway space |
| Zeitraum | period space |
| Registrar | registrar |
| Regenwurm | earthworm worm |
| Regie | direction |
| Regina | Regana Regena Regina |
| Regisseur | director |
| Registratur | registry |
| Regler | controller |
| regional | regional |
| regsam | active lively |
| Hegira | Hijra |
| Negierung | denial |