- Antiphlogistic
- Anti-semitism
- Antiquities
- Antitank
- Antlered
- Apian
- Attentions
- Attorney-general
- Accents
- Aide-memoire
- Attracting
- Attributed
- Aimed
- Aiming
- Accomplishments
- Augmented
- Air-conditioning
- Air-conditioned
- Air-ship
- Air-tight
- Accosting
- Accreted
- Appointments
- Alarms
- Albuminous
- Aquaculture
- Ack-ack
- Auto-suggestion
- Avant-garde
- Alighting
- Arch-enemy
- Affianced
- Acrobatic feat
- Acted
- Actinism
- Avian
- Argosy
- All-around
- Argued
- Addle-head
- All-embracing
- Alleviating
- All-night
- All-in
- All-in-one
- Addresses
- All-knowing
- Arraying
- All-round
- All-purpose