| doktrinal | doctrinal |
| doktrinär | doctrinaire |
| Doktrin | doctrine |
| Doktorin | Doctor |
| Okarina | ocarina |
| Doktorat | doctorate |
| Doktorand | Ph.D. candidate Ph.D. student doctorand |
| Doktorgrad | doctor's degree |
| Doktortitel | doctor's degree doctoral level |
| oktal | octal |
| Dextrin | dextrin |
| Trial | trial |
| tribal | tribal |
| trinär | trinary |
| Drina | Drina |
| Quirinal | Quirinal Hill |
| Urinal | urinal |
| urinal | urinary urinal |
| Dakerin | Dacian |
| Domina | dominatrix |