- Altruistic
- Alu
- Alumna
- Alumnus
- Alzheimer's disease
- Amalgamation
- Amassed
- Amative
- Amethyst
- Amicably
- Amicue curie
- Amidst
- Amoeba
- An acquatic plant
- An arrow
- An either or situation
- An electuary
- An expiatory spell
- An ignoramous
- An iron hand in a velvet glove
- An ornament
- An ornament for the neck
- Anabasis
- Anachronism
- Anaconda
- Anaesthetic
- Anal sex
- Analects
- Analgesia
- Analog
- Analystic mind
- Analytic
- Anarchic
- Anarchical
- Anathema
- Andropogon
- Anechoic
- Anelectorde
- Anesthetized
- Angelic
- Angelica
- Angioplasty
- Angle
- Angle-hook
- Angled hook
- Anglo-catholic
- Anglo-saxon
- Angrily
- Angry man
- Angry outburst
- Annihilator
- Annoinment
- Annointed
- Announce
- Announcement
- Annoyance
- Anodyne
- Anointin
- Anon
- Anonymity
- Anteroom
- Anthers
- Anthill
- Anthology
- Anthropic
- Anthropoid
- Anti-tank
- Antianxiety
- Antichthon
- Anticipate
- Anticipating
- Anxiously
- Any eye-salve
- Any more
- Anybody
- Anyone
- Anything real
- Anytime
- Aortal
- Apart from
- Ape
- Aperitif
- Apheresis
- Aplasia
- Aplenty
- Apocalyptic
- Apolitical
- Apologue
- Apoplectic
- Apostatize
- Apostrophe
- Apotheosis
- Applicable
- Application window
- Applicator
- Appointed
- Appointed time
- Apposite
- Apposition
- Appraisal