| regulieren | regulate set |
| deregulieren | deregulate |
| Regulierung | regulation |
| regieren | govern reign |
| emulieren | emulate |
| reduzieren | reduce decrease |
| refutieren | refute |
| refüsieren | refuse |
| resultieren | result |
| resümieren | sum up |
| Regalien | regalia |
| regredieren | regress |
| degustieren | degust |
| koagulieren | coagulate |
| undulieren | undulate |
| ambulieren | a |
| demoulieren | unmould |
| fabulieren | tell |
| gratulieren | congratulate |
| kopulieren | copulate make a splice graft join with a copula |