| Regelwerk | legal framework |
| Regenwurm | earthworm worm |
| Regler | controller |
| regelbar | adjustable |
| Gegenwert | correspondence |
| Federwerk | clockwork |
| Feuerwerk | firework fireworks |
| Gewerk | trade |
| Sägewerk | sawmill lumbermill |
| Regalien | regalia |
| Regeln | control |
| regeln | control manage regulate |
| Regeltreue | compliance |
| Regenwolke | rain cloud |
| Register | register array |
| regellos | licentious |
| Regel | rule regulation period |
| Regelbuch | rulebook |
| Regelkreis | closed loop control loop |
| Regelung | closed-loop control regulation arrangement |