- achromatic colour
- achromatic color
- a state of (mutual) tension
- a pentagon
- acicular
- acerate
- acerose
- anterior symblepharon
- anterior spinal artery syndrome
- a stem
- annulus fibrosus
- a stick
- acetonemia
- acidemia
- acclimate
- acclimatise
- acclimatize
- addis ababa
- abstractive
- abounding in compassion
- a dip
- a pamphlet
- agama
- a nest
- a tent
- a feat
- account statement
- accountancy
- a grating noise
- as things turned out
- australian aborigine
- a steamer
- a half_pint bottle
- an oar
- arrested
- a girdle (of gold silver or yarn etc.)
- a timid man
- anacyclus pyrethrum
- air raid
- a gift
- actual tare
- absence of interruption
- an issue
- a problem
- abut
- a snow_ball
- adventitial
- avantika
- a typical indian sweet
- alimentary system