- 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
- Anesthetist
- Aneurysms
- Anger
- Angina
- Angiras
- Anglicize
- Angling
- Anglo
- Anglophone
- Angora
- Angry
- Anonymous letter
- Anorexic
- Another key
- Answer back to
- Answer for
- Antechamber
- Antennae
- Antepenultimate
- Anterior
- Anther
- Anthrop
- Anthropocentric
- Anthropological
- Anthropologist
- Anti-revolutionary
- Anti-semitic
- Antibody
- Antic
- Antichrist
- Anxiety
- Anxious
- Anxiousness
- Any day
- Any small bird
- Anything
- Anything solid
- Anythink
- Apathetic
- Apercu
- Aphemia
- Apparatus
- Apparel
- Appealer
- Appealingly
- Appellant
- Appellation
- Appendicitis
- Appertain
- Appetise
- Appetite
- Apple of the eye
- Apprehend
- Apprehension
- Apprehensively
- Apprise
- Apprize
- Approachable
- Approbate
- Approbatory
- Approve
- Approving
- April
- Apriori
- Apriorism
- Apropos
- Apse
- Arboured