- DAF
- Dark /l/
- dB
- De-accenting
- De-alveolar assimilation
- Debuccalisation
- Decibel
- Declination
- Defective distribution
- Defective vowel system
- Degemination
- Delayed auditory feedback
- Delayed release
- Dental
- Dentolabial
- Derivation
- Designated terminal element
- Devoicing
- DFT
- Diacritic
- Diacritic feature
- Dialect
- Diffuse
- Diglossia
- Diphthong
- Dissimilation
- Distinctive feature
- Distinction
- Distributed
- Distribution
- Disyllable
- Dorsal
- Double articulation
- Double-stressed
- Downstep
- Drag-chain
- DTE