- A good while
- A hand-blow
- A hard nut to crack
- A heavy heart
- A hell on earth
- A helping hand
- A hill tribe
- A hit below the belt
- A homely game
- A jain priest
- A lamb to the slaughter
- A lame duck
- A level
- A little
- Admin
- Abandon
- Abandonments
- Abash
- Abasing
- Abate
- Abattoir
- Abbey
- Abbot
- Abbreviated
- Abdomen
- Abdominal
- Abdominous
- Abductor
- Aboard
- Abode of ascetics
- Abodes
- Abolish
- Aboriginal hunters tribe
- Aborigine
- Abortion
- Abound in
- Abounds
- About
- Above par
- Absentation from mention
- Absolute majority
- Absolute ruler
- Absolution
- Absolve
- Absorber
- Abstain
- Abstention
- Abstract
- Accentuate
- Accessed
- Accidental
- Accidentality
- Acclamatory shouting
- Acclimatization
- Accommodation
- Accompaniments
- Accomplish
- Accomplished
- Accomplishment quotient
- Accordant
- Accorded
- Accordingly
- Accountrements
- Accounts payable
- Accounts receivable
- Accoustics
- Acetic acid
- Ache
- Acid lemon
- Acidophilus
- Acidulous
- Acknowledge
- Acknowledged
- Acm
- Acne
- Acorn
- Acoustic
- Act of peace
- Action meter
- Action-packed
- Activate
- Active server pages
- Active service
- Active voice
- Actively
- Activeness
- Activewear
- Actress
- Actual
- Actualise
- Add on
- Add up
- Addicted
- Addictive
- Adding
- Additional
- Addle
- Addled
- Address field
- Addressee