- Affluence
- Afford
- Afforestation
- Afterwards
- Agamous
- Aged
- Ageless
- Agent provocateur
- Aggravated
- Aggregate
- Aggression
- Agricultural
- Agriculturalist
- Agroecosystem
- Agrology
- Aha
- Ahtma and anathma
- Aim
- Aiming
- Aims
- Airless
- Airlift
- Airpower
- Airs
- Airtime
- Airworthy
- Alacarte
- Alack
- Alameda
- Alarming
- Alimentary
- Alive
- Alkaline
- All
- All dressed up with nowhere to go
- All fools day
- All found
- All hail
- All in all
- All is well
- Allerliefste
- Allocution
- Allspice
- Allude
- Allurment
- Alluvial
- Alluvium
- Ally
- Alma mater
- Almoner
- Almost
- Altercate
- Altercation
- Alternate
- Altimeter
- Altogether
- Alumni
- Alveolar
- Amalgam
- Amanuensis
- Analyze
- Ami
- Amidships
- Amiss
- Ammonia
- Amnesty
- Amok
- Among muslims
- Amusing
- An agony uncle
- An air of mystery
- An early bird
- An inter-planetary period
- An opening flower
- An upanishad
- Anatomically
- Ancestors
- Ancestral
- Ancestral home
- Anchor
- Anchorage
- Anchorite
- Anchovy
- And
- And another thing
- And how
- And so forth
- Android
- Anguish
- Anguished
- Animadversion
- Anorexigenic
- Animal magnetism
- Animate
- Animism
- Anise
- Ankus
- Annex
- Annexation
- Annexed to