- Abaddon
- Abandoned
- Abandoned woman
- Abandonment
- Abased
- Abashed
- Abba
- Abbreviation
- Abbreviator
- Aberrant
- Aerial navigation
- Aerial torpedo
- Aerial vehicle
- Aero logy
- Aeromancy
- Aeronautic
- Aerosol
- Aesthetically
- Aestivation
- Afebrile
- Affairs
- Affectedly
- Aliment
- Alkali
- Alkalinity
- All along
- All clear
- All directions
- All in a maze
- All in good time
- All of a sudden
- Allocate
- Allopathy
- Allotropism
- Allow
- Allowance
- Allurement
- Alluvion
- Almighty
- Almond
- Almound tree
- Alternative
- Alternative energy
- Alternatively
- Alto
- Alum
- Always
- Am
- Amalgamate
- Amateur
- American football
- American indian
- Americanism
- Americium
- Amerindian
- Amiability
- Amiableness
- Amicus curiae
- Amid
- Ammunition
- Amniocentesis
- Among
- Amorality
- Amusements
- An
- An abuse
- An agonist
- An arm and a leg
- An ascetic
- An ayurvedic treatment
- An edible snail
- An even chance
- An item in phyrotechnics
- An oil-press
- An old head on young shoulders
- Anatomist
- Anatomy
- Ancestor
- Ancestry
- Ancient story
- Ancillary
- And a half
- And that's flat
- And the like
- And then
- And things
- And what is more
- Andirons
- Androcentricity
- Andropause
- Annihilated
- Annihilation
- Annualized
- Annuity
- Annus mirabilis
- Anodise
- Anomalous
- Anonym
- Anus
- Anterior