- Anode
- Anoint
- Anointing sick
- Anole
- Anopheles
- Anorak
- Anorexia
- Anosmia
- Another cup of tea
- Anoxia
- Answer
- Answering
- Antagonist
- Antagonistic
- Antares
- Anteater
- Antebellum
- Antecedence
- Antenna
- Anthelmintic
- Anther lobe
- Anthocephalus indicus
- Anthocyanins
- Anthropocene
- Anthropology
- Anthropomorphism
- Anti
- Anti virus software
- Anti-aircraft
- Anti-grammatical
- Anti-incumbent
- Anti-money laundering
- Antibiotic
- Anticipatory bail
- Anticoagulant
- Antidemocrat
- Antidote
- Antifreeze
- Antigen
- Antiperspirant
- Antiphon
- Antiseptic
- Antisocial
- Ants
- Ants in ones pants
- Antsy
- Anxiety disorders
- Any
- Any day now
- Anyplace
- Anything but
- Anything small
- Anyway
- Aourora
- Apathy
- Apepsy
- Aperture
- Apex
- Aphid
- Aphrodisiac
- Apiology
- Apnoea
- Apocryphal
- Apodyopsis
- Apogee
- Apology
- Apophenia
- Apophysis
- Apoptosis
- Aporia
- Apostasy
- Apostate
- Appalled
- Appalling
- Apparently
- Appeal
- Appearance
- Appeasement
- Append
- Applaud
- Apple-pie order
- Aria
- Applicability
- Application form
- Applies
- Applying
- Appointee
- Apportion
- Appraise
- Appraisement
- Appreciable
- Appreciated
- Apprehensible
- Appropriately
- Appropriateness
- Appropriation
- Approver
- Approximate
- Appulse
- Appurtenance