- Ampuversary
- Amuse
- Anamnesis
- Anatomical
- Anaerobic
- Anaesthesia
- Anaesthesiologist
- Anaesthetize
- Anal fissure
- Analog computer
- Analysis
- Analyst
- Analystical
- Anantha
- Anarchy
- Anathematize
- Ancestoral home
- Ancestral wealth
- Anchoring
- Ancients
- And so on
- Androgen
- Androgynous
- Angry word
- Anile
- Animal husbandry
- Animatedly
- Animation
- Animus
- Ankle joint
- Anklet
- Annalist
- Anneal
- Anonymously
- Aortis
- Anothers
- Answer the door
- Answerable
- Ant
- Ant-lion
- Antagonism
- Ante-mortem
- Antecedent
- Antedate
- Antediluvian
- Antelope
- Antemeridian
- Antenatal
- 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
- Applicant
- Application software
- Applied
- Applique
- Apply
- Appoint
- Appointment
- Appologised
- Appoointed
- Apportioning
- Apportionment
- Appose
- Appraisable
- Appraisee
- Appreciably
- Appreciate
- Aptly
- Aqua regia
- Aquaculture
- Arab
- Arabian jasmine
- Arbiter
- Arbitral
- Architrave