- 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
- Anabolic steroid
- Anachronistic
- Anaemic
- Anagram
- Anal
- Analectic
- Analgesic
- Analogue
- Analyse
- Anandrous
- Anaphase
- Anecdotal
- Anemic
- Anemone
- Anesthetize
- Anew
- Angel
- Angiosperms
- Angler
- Anglican
- Annotation
- Announcing
- Annoy
- Annoying
- Annual
- Annul
- Annulment
- Annuls mirabilis
- Annunciate