| dual | doble |
| Dual boot | Arranque dual |
| dual citizenship | doble nacionalidad |
| dual economy | economía dual |
| Dual energy X-ray absorptiometry | Densitometría osea |
| dual scan | doble barrido |
| Dual space | Espacio dual |
| dual waste management | gestión de residuos dual |
| Dual-channel architecture | Dual Channel |
| Dual-core | Multi núcleo |
| Dual-licensing | Licencia dual |
| Dual-tone multi-frequency | Marcación por tonos |
| Duala language | Duala |
| Duala people | Duala |
| dualism | dualismo |
| Duane | Pulgada |
| Duane Arnold Energy Center | Central Nuclear Duane Arnold |
| Duarte Leite | Duarte Leite Pereira da Silva |
| Duarte Province | Duarte |
| Duat | Duat |
| dub | doblar |
| Dub music | Dub |
| Dub poetry | Poesía dub |
| Duba | Duba |
| Dubai | Dubái |
| Dubai International Airport | Aeropuerto Internacional de Dubai |
| Dubai leader Sheikh Maktoum bin Rashid Al Maktoum dead | Vicepresidente de los Emiratos Árabes muere durante visita a Australia |
| Dubai Metro | Metro de Dubai |
| Dubai Tennis Championships | Torneo de Dubai |
| Dubailand | Dubailand |
| dubbin | adobo |
| dubbing | adobo |
| Dubhe Alpha Siegfried | Siegfried de Dubhe Alfa |
| Dubica | Bosanska Dubica |
| dubious | dudoso |
| dubiousness | incertidumbre |
| dubitation | angustia |
| Dublin | Dublín |
| Dublin Area Rapid Transit | Dublin Area Rapid Transit |
| Dublin Castle | Castillo de Dublín |
| Dublin Core | Dublin Core |
| Dublin Metro | Metro de Dublín |
| Dublin Metropolitan Police | Policía Metropolitana de Dublín |
| Dubliners | Dublineses |
| dubnium | dubnio |
| Dubois | Dubois |
| Dubplate | Dubplate |
| Dubreuillosaurus | Dubreuillosaurus |
| Dubrovnik | Dubrovnik |
| Dubrovnik Airline | Dubrovnik Airline |
| Dubuque | Dubuque |
| ducal | ducal |
| Ducal Prussia | Ducado de Prusia |
| ducat | ducado |
| Ducati Motor Holding | Ducati |
| Duccio | Duccio |
| Duchenne muscular dystrophy | Distrofia muscular de Duchenne |
| duchess | duquesa |
| duchy | ducado |
| Duchy of Amalfi | República amalfitana |
| Duchy of Athens | Ducado de Atenas |
| Duchy of Brabant | Brabante |
| Duchy of Bremen | Bremen |
| Duchy of Cantabria | Ducado de Cantabria |
| Duchy of Carinthia | Carintia |
| Duchy of Jülich | Jülich |
| Duchy of Limburg | Limburgo |
| Duchy of Lorraine | Ducado de Lorena |
| Duchy of Mantua | Gonzaga |
| Duchy of Milan | Ducado de Milán |
| Duchy of Modena and Reggio | Módena |
| Duchy of Naples | Ducado de Nápoles |
| Duchy of Nassau | Nassau |
| Duchy of Neopatria | Ducado de Neopatria |
| Duchy of Normandy | Ducado de Normandía |
| Duchy of Parma | Ducado de Parma |
| Duchy of Prussia | Ducado de Prusia |
| Duchy of Savoy | Ducado de Saboya |
| Duchy of Saxony | Sajonia |
| Duchy of Styria | Estiria |
| Duchy of Vasconia | Ducado de Vasconia |
| Duchy of Warsaw | Gran Ducado de Varsovia |
| duck | pato |
| Duck and cover | Duck and Cover |
| Duck confit | Confit de canard |
| duck out | librarse hábilmente |
| duck tape | cinta americana |
| duck-billed platypus | ornitorrinco |
