- a multitude of
- a large number
- a dribble of
- as thick as thieves
- a la mode
- armed robber
- airway
- abandon one's principles
- as busy as a bee
- amateurishly
- agley
- accidie
- aye aye
- ambrosial
- almsgiver
- at close quarters
- ad libitum
- accolades
- as plain as the nose on your face
- AWOL
- argufy
- astronomic
- a rip-off
- alky
- a considerable number
- absent oneself from
- a pickle
- a scrape
- abide it
- abused
- a muddle
- anti-Semitism
- amok
- a hoot
- a ball
- an additional number
- amigo
- aforethought
- a splash of
- anorexic
- a bundle of nerves
- as clear as mud
- assist be of assistance to
- all over the map
- administrate
- as sound as a bell
- age spot
- a wealth of
- an addition
- acting up
- approachability
- as plain as the nose on one's face
- advantageousness
- a.s.a.p. as soon as possible
- auditioner
- as near as dammit
- attached to
- a.s.s.p
- a pinch of
- acclivitous
- area of expertise
- a goose egg
- airheaded
- a cinch
- acting-up
- allaying
- a cakewalk
- an arm and a leg
- arful
- amate-urrish
- acclimate
- as sharp as a tack
- all ears
- adulate
- a mess
- at the speed of light
- arch-
- anatomize
- altercate
- almost always
- abounding in
- all-year-round
- a load
- a pretty kettle of fish
- a sprinkling of
- a clinch
- a shambles
- an increase
- ageism
- alphabetize
- at nay rate
- a scream
- a shake up
- and collected
- as white as a sheet
- anti-Semitic
- about to happen
- agreed
- at bottom
- apodictic