- Affiliation
- Affinity
- Affirm
- Affirming
- Afflict
- Affliction
- Affluent
- Afford to
- Affray
- Again and again
- Against ones wishes
- Against the clock
- Agape
- Age limit
- Age of kali
- Ager
- Agglomerate
- Agglomeration
- Aggrandize
- Aggrandizement
- Aggravate
- Aggravating
- Aggravation
- Aggress
- Agreement
- Agribusiness
- Agronomy
- Ague
- Ah!
- Ahead
- Aide-de-camp
- Ailing
- Ailurophile
- Ailurophobia
- Aimless
- Ain't
- Airing cupboard
- Airline
- Airlock
- Airman
- Airport
- Airship
- Airstrip
- Airtight
- Aisle
- Aiyo
- Ajinomoto
- Alabaster
- Alarm clock
- Almsgiving
- Almshouse
- Aloe plant
- Aloe spicata
- Aloe vera
- Aloof
- Alopecia
- Alpine
- Alright
- Alsatian
- Also
- Alstonia genus
- Altair
- Altar
- Alter
- Amazement
- Amazon
- Ambiance
- Ambiguous
- Ambitious
- Amblyopia
- Ambulatory
- Ameliorative
- Amorous
- Amortize
- Amperage
- Ampere
- Amplifier
- Amplify
- Amply
- Ampoule
- Amputate
- Amuck
- Amusement
- Anabolism
- Anacardium occidentale
- Anaemia
- Anaesthetist
- Analogous
- Analogy
- Analysable
- Analyse, analyze
- Anandavardhana
- Anarchism
- Anarchist
- Anasarca
- Anecdote
- Anemia
- Anencephalus
- Anent
- Anesthetic