| Dioptrie | diopter dioptre |
| Diopsid | diopside |
| Dioptas | dioptase |
| Diopter | diopter |
| Diorit | diorite |
| Idiolatrie | idiolatry |
| Idiotie | idiocy |
| Biopsie | biopsy |
| -iatrie | -iatry |
| Biometrie | biometrics |
| Doktrin | doctrine |
| Drogerie | drugstore druggist’s druggist’s shop |
| Dione | Dione |
| Radiolarie | radiolarian |
| Diode | diode |
| Dioxid | dioxide |
| Dioxin | dioxin |
| Diözese | diocese bishopric |
| Idiotin | idiot |
| Biophilie | biophilia |