- Adjournment
- Adjudicatior
- Adjure
- Adjustable
- Adjustment
- Adored
- Adorned
- Adornments
- Adrenalin
- Adroit
- Adsorb
- Adulatory
- Adulterous
- Adulthood
- Adumbrant
- Advancement
- Advantageous
- Adventure
- Adventure playground
- Aerobics
- Aerodrome
- Aerogram
- Aeronomy
- Aesthete
- Aesthetical
- Aetiology
- Affability
- Affably
- Affaiars
- Affair
- Affaire de coeur
- Affect
- Affected
- Affectedness
- Afoot
- Aforementioned
- Afraid of his own shadow
- Afrikaans
- After
- After a fashion
- After petticoat
- After that
- Afterbirth
- Afterglow
- Aftermath
- Aggrieve
- Aggrieved
- Agiary
- Agility
- Aglets
- Agnate
- Ago
- Agonizing
- Air hostess
- Air letter
- Airbase
- Airfield
- Airing
- Alike
- Alimentary canal
- Aliquot
- Alkalimeter
- Alkaline salt
- Alkalization
- Alkaloid
- All agog
- All of a shake
- Allergy
- Alleviate
- Alleviation
- Alliance
- Allocation
- Allopath
- Allotment
- Allotropy
- Almanac
- Alteration
- Alternative medicine
- Although
- Altmodisch
- Aluminium
- Amanhatop
- Amaranth
- Amaranthine
- Amass
- Amateurish
- Amorphous
- Amphetamine
- Amphiboly
- Ample
- Ampule
- Ampuversary
- Amuse
- Anamnesis
- Anatomical
- Anaerobic
- Anaesthesia
- Anaesthesiologist
- Anaesthetize
- Anal fissure