- Alarm
- Alarmed
- Alike
- Alimentary canal
- Aliquot
- Alkalimeter
- Alkaline salt
- Alkalization
- Alkaloid
- All agog
- All of a shake
- Allergy
- Alleviate
- Alleviation
- Alliance
- Allocation
- Allopath
- Allotment
- Allotropy
- Almanac
- Alteration
- Alternative medicine
- Although
- Altmodisch
- Aluminium
- Amanhatop
- Amaranth
- Amaranthine
- Amass
- Amateurish
- American
- American politics
- Americana
- Americanize
- Amiable
- Amiably
- Amicable
- Amigo
- Amine
- Amino acid
- Amity
- Amla
- Ammeter
- Ammo
- Ammonite stone
- Amnesia
- Amongst
- Amoral
- Amusement park
- Amusingly
- An apple of discord
- An assylum
- An item in phyrotechnic
- An object of ridicule
- An thesis
- An ugly duckling
- Ancestoral home
- Ancestral wealth
- Anchoring
- Ancients
- And so on
- Androgen
- Androgynous
- Angry word
- Anile
- Animal husbandry
- Animatedly
- Animation
- Animus
- Ankle joint
- Anklet
- Annalist
- Anneal
- Annexure
- Annihilate
- Annihilates
- Anniversary
- Anno domini
- Annona
- Annotate
- Announcer
- Annoyed
- Annually
- Annular eclipse
- Anointed
- Anointing
- Anomaly
- Anonymous
- Anticlimax
- Anticlockwise
- Antics
- Antimony
- Antipathetic
- Antipathy
- Antipodes
- Antipole
- Antiquated
- Antitoxin
- Antler
- Antonym