- Abhor
- Abide by
- Ability to understand
- Abiotic
- Abjuration
- Able
- Able-bodied
- Ably
- Abominate
- Aborti-facient
- Abortionist
- Abound
- Abounding
- Above all
- Above criticism
- Absentee
- Absolute address
- Absolute control
- Abstain from
- Abstaining
- Abstention from buying
- Abstention from condemning
- Abstinence
- Abstinence from eating and drinking
- Abstinent
- Abstracted
- Absurdly
- Abundant
- Abuse
- Abusive
- Abyss
- Abyssal
- Acacia adoratissima
- Acacia intsia
- Academia
- Academy
- Acarpous
- Accede
- Accelerate
- Accelerator
- Accept
- Acceptability
- Acceptable
- Accepting
- Access
- Accessible
- Accidentally
- Accidial
- Acclaim
- Acclamation
- Acclamatory
- Acclimate
- Acclimation
- Acclimatise
- Acclimatize
- Accommodate
- Accompanied by
- Accretion
- Accrue
- Accumulate
- Accumulating
- Accurate
- Accurately
- Accusal
- Accusation
- Accused man
- Accustomed
- Accustomed to
- Ace
- Aceldama
- Acerbate
- Acerbity
- Acetate
- Acquainted
- Acquiescence
- Acquiescent
- Acquire
- Acquired
- Acquired taste
- Acquit oneself well
- Acquitted
- Acreage
- Acrochordon
- Actuality
- Acute-angled cucumber
- Acuteness
- Ad
- Ad interim
- Ad valorem
- Adam's apple
- Adamantly
- Adaptability
- Adhatoda vasica
- Adherent
- Adiabatic
- Adieu
- Adipose
- Aditya
- Adjourn
- Adjutant