| Diaprojektor | slide projector |
| Projektor | projector |
| Protektor | protector |
| Videoprojektor | PC projector digital projecto multimedia projector projector video projector |
| Direktor | manager director headmaster principal senior vice president |
| Präprozessor | precompiler preprocessor |
| Prospektor | prospector |
| Bauprojekt | building project construction project development |
| Projekt | project plan |
| Projektil | projectile |
| Projektion | projection |
| Introjektion | introjection |
| Distraktor | distracter |
| Diakritikon | diacritical mark diacritical |
| Dialysator | dialyzer |
| Dialekt | dialect slang |
| Dialektik | dialectic |
| Diapositiv | diapositive |
| dialektal | dialectal |
| Iapetos | Iapetus |