- doctorfish
- Doctor of Theology
- doctor's bill
- DPH
- doctor_fish
- degree of fluidity
- debasing
- degree of safety
- dracaena
- doo_wop
- drafter
- diphenylbutyl piperidine
- debugging aid
- debug statement
- device driver
- dragoman
- double star
- director of research
- den mother
- directed study
- double clinch
- demand note
- drop the ball
- desiccant
- draughtsman
- draftsperson
- dental hygienist
- drooling
- dribbling
- dork
- descriptive linguistics
- drawshave
- depolymerise
- diva
- diploic artery
- denitrification
- dihybrid
- dead ringer
- diametrically
- department head
- doyen
- directional microphone
- ditz
- den haag
- daycare
- didion
- dimwit
- din into
- deprecatory
- deprecative