- A-accent
- AAVE
- Abduction
- Ablaut
- Accent
- Accidental gap
- Acoustic cue
- Acrolect
- Active articulator
- Acute
- Adaptation
- Adduction
- Advanced
- Advanced tongue root
- Affricate
- Affrication
- African American Vernacular English
- Airflow
- Airstream mechanism
- Aitken’s law
- Alignment
- Allophone
- Alpha notation
- Alternating stress rule
- Alternation
- Alveolar
- Alveolar ridge
- Alveolo-palatal
- Ambisyllabicity
- Amplitude
- Amplitude-frequency spectrum
- Anacrusis
- Anaptyxis
- Anechoic chamber
- Angled brackets
- Angma
- Anterior
- Anticipatory assimilation
- Antiresonance
- Anvil
- Aperiodic
- Apex
- Aphaeresis
- Aphesis
- Apical
- Apico-palatal
- Apocope
- Approach
- Approximant
- Archiphoneme
- Areal feature
- Articulator
- Arytenoid
- Ash
- Ash tensing
- Aspirate mutation
- Aspiration
- Assimilation
- Association
- Attenuation
- ATR
- Audiogram
- Audiometer
- Auslautverhӓrtung
- Autocorrelation
- Autosegmental phonology