- duad
- duet
- duo
- doughnut
- dog tag
- duty tour
- desyrel
- divide
- deutsche mark
- deutschmark
- dupe
- distrain
- dactyl
- dead letter
- driving axle
- dead axle
- daubentonia madagascariensis
- domestic help
- domestic
- deoxyguanosine
- deoxycytidine
- dozen
- degree program
- degressive tax
- doctor's degree
- doctorate
- degrading
- downfall
- debugger
- delivery boy
- delivery van
- daw
- deipnosophist
- driven
- drooler
- dribbler
- drawknife
- dictatorial
- diploid
- dean
- director
- dido
- din
- destroyed
- down the drain
- done for
- dioxin
- dirt
- darn
- dickhead