| Dreidecker | triplane |
| Freidenker | libertarian |
| Dreieck | triangle |
| dreieckig | triangular |
| Eindecker | monoplane |
| Verdecker | concealer |
| Dachdecker | roofer |
| Dreißiger | thirties |
| dreizackig | three-pronged |
| Drehleier | hurdy-gurdy |
| Drehleiter | turntable ladder |
| Drehmelder | resolver selsyn synchro |
| Dreidel | dreidel |
| Dreier | threesome |
| Dreizack | trident arrowgrass |
| dreierlei | three |
| dreiteilen | trisect |
| Freidenkerin | freethinker |
| Reicher | affluent |
| Reineke | Reynard |