- Amputation
- Amranthus polystachys
- Amulet
- Amused
- Amusement arcade
- Amusing
- An agony uncle
- An air of mystery
- An early bird
- An inter-planetary period
- An opening flower
- An upanishad
- Anatomically
- Anabolic steroid
- Anachronistic
- Anaemic
- Anagram
- Anal
- Analectic
- Analgesic
- Analogue
- Analyse
- Anandrous
- Anaphase
- Ancestors
- Ancestral
- Ancestral home
- Anchor
- Anchorage
- Anchorite
- Anchovy
- And
- And another thing
- And how
- And so forth
- Android
- Anecdotal
- Anemic
- Anemone
- Anesthetize
- Anew
- Angel
- Angiosperms
- Angler
- Anglican
- Anguish
- Anguished
- Animadversion
- Anorexigenic
- Animal magnetism
- Animate
- Animism
- Anise
- Ankus
- Annex
- Annexation
- Annexed to
- Annotation
- Announcing
- Annoy
- Annoying
- Annual
- Annul
- Annulment
- Annuls mirabilis
- Annunciate
- 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