- Algae
- Alias
- Alice
- Alight
- Aligned
- All over with
- All the
- All-embracing
- All-fired
- Allah
- Allegiance
- Allegory
- Alleluia
- Aloe family
- Alone
- Along
- Along the way
- Alongside
- Aloofness
- Aloplecia
- Aloud
- Alpaca
- Alpha and omega
- Alphabetical
- Alphabetically
- Alphabetize
- Alter ego
- Ambalavasis
- 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
- Anonymously
- Aortis
- Anothers
- Answer the door
- Answerable
- Ant
- Ant-lion
- Antagonism
- Ante-mortem
- Antecedent
- Antedate
- Antediluvian
- Antelope
- Antemeridian
- Antenatal
- Anticlimax
- Anticlockwise
- Antics
- Antimony
- Antipathetic
- Antipathy
- Antipodes
- Antipole
- Antiquated
- Antitoxin
- Antler