| Delphinarium | dolphinarium |
| Delfinarium | dolphinarium |
| Delirium | delirium insanity |
| Tepidarium | hothouse |
| Delphin | Delphinus |
| Apiarium | apiary beeyard |
| Bestiarium | bestiary |
| Lapidarium | lapidarium |
| Dapingium | Dapingian |
| Euphonium | euphonium |
| Delawarin | Delaware |
| Delphi | Delphi |
| deliriös | delirious |
| delphisch | Delphic |
| Amphibium | amphibian |
| Nephilim | Nephilim |
| Philtrum | philtrum |
| Seminarist | seminarist |
| Deklination | declension declination |
| Destination | destination |