Merriam-Webster's Collegiate Dictionary:
acre
acre-foot
acre-inch
acreage
acrid
acridine
acridine orange
acridity
acridly
acridness
acriflavine
acrimonious
acrimoniously
acrimoniousness
acrimony
acritarch
acro-
acrobat
acrobatic
acrobatically
acrobatics
acrocentric
acrolect
acrolein
acromegalic
acromegaly
acronym
acronymic
acronymically
acropetal
acropetally
acrophobe
acrophobia
acrophobic
acropolis
acrosomal
acrosome
across
across the board
across-the-board
acrostic
acrostical
acrostically
acrylamide
acrylate
acrylic
acrylic acid
acrylic fiber
acrylic resin
acrylonitrile
acs
act
act of god
act out
act up
actability
actable
actaeon
acte
acte gratuit
actg
acth
actin
actin-
acting
actini-
actinian
actinic
actinically
actinide
actinium
actino-
actinolite
actinometer
actinometric
actinometry
actinomorphic
actinomorphy
actinomyces
actinomycete
actinomycin
actinomycosis
actinomycotic
action
action figure
action painter
action painting
action potential
actionable
actionably
actioner
actionless
actium
activate
activated carbon
activated charcoal
activation
