- Ambassador
- Amber
- Ambient
- Ambition
- Ambivalent
- Ambivert
- Ambrosia
- Ambulant
- Amchur
- Ameliorable
- Ameliorate
- Amen
- Amenable
- Amend
- Amenity
- Amorphous
- Amphetamine
- Amphiboly
- Ample
- Ampule
- Ampuversary
- Amuse
- Anamnesis
- Anatomical
- Anaerobic
- Anaesthesia
- Anaesthesiologist
- Anaesthetize
- Anal fissure
- Analog computer
- Analysis
- Analyst
- Analystical
- Anantha
- Anarchy
- Anathematize
- Angry word
- Anile
- Animal husbandry
- Animatedly
- Animation
- Animus
- Ankle joint
- Anklet
- Annalist
- Anneal
- Annexure
- Annihilate
- Annihilates
- Anniversary
- Anno domini
- Annona
- Annotate
- Announcer
- Annoyed
- Annually
- Annular eclipse
- Anointed
- Anointing
- Anomaly
- Anonymous
- Anthem
- Antherdiopore
- Anthracite
- Anthrax
- Anthropogenic
- Anthropography
- Anti lice
- Anti-semite
- Anyhow
- Anything visible
- Anywhere
- Aorta
- Ap
- Apace
- Apart
- Apartheid
- Apartment
- Apeman
- Aphasia
- App
- Appealing
- Appearing
- Appease
- Appeased
- Appendectomy
- Appetence-cy
- Appetizer
- Applause
- Appreciative
- Apprentice
- Apprenticeship
- Apprised
- Approach
- Approached
- Approbation
- April fool
- Arboreal
- Arcade
- Arch-enemy