aceto-
acetometer
acetone
acetone body
acetophenetidin
acetous
acetum
acetyl
acetyl promazine
acetylate
acetylcholine
acetylene
acetylene series
acetylsalicylic acid
acey-deucey
ACH
Achaea
Achaean
Achates
ache
Achebe
achene
Achernar
Acheron
Acheulean or Acheulian
achieve
achievement
achillea
Achilles
Achilles' heel
Achilles' tendon
Achitophel
achlamydeous
achlorhydria
achondrite
achondroplasia
achromatic
achromatin
achromatism
achromatize
achromatous
achromic
Achromycin
achy
acicula
aciculate
aciculum
acid
acid number
acid rain
acid rock
acid test
acidanthera
acid-fast
acid-forming
acidhead
acidic
acidify
acidimeter
acidity
acidophil
acidophilus milk
acidosis
acidulate
acidulous
acierate
aciform
acinaciform
aciniform
acinus
-acious
-acity
ack-ack
ackee
acknowledge
acknowledged
acknowledgment or acknowledgement
aclinic line
ACLU
acme
acne
acnode
acock
acolyte
Aconcagua
aconite
acorn
acorn barnacle
acorn squash
acorn tube
acotyledon
acoustic
acoustical
acoustically
acoustician
acoustics
acoustooptics
acquaint
acquaintance
acquiesce
acquiescence
acquiescent
acquire
acquired character
acquired immune deficiency syndrome
acquirement
acquisition
acquisitive
acquit
acquittal
acquittance
acre
Acre¹
Acre²
acreage
acre-foot
acre-inch
acrid
acridine
acriflavine
Acrilan
acrimonious
acrimony
acritical
acro-
acrobat
acrobatics
acrocarpous
acrocephaly
acrogen
acrolein
acrolith
acromegaly
acromion
acronical or acronycal
acronym
acropetal
acrophobia
acropolis
acrosome
acrospire
across
across-the-board
acrostic
acrylate
acrylic
acrylic acid
acrylic color
acrylic fiber
acrylic painting
acrylic resin
acrylonitrile
ACS
act
act of God
Acta Sanctorum
actable
Actaeon
actg
ACTH
actin
actin-
actinal
acting
actinia
actinic
actinic rays
actinide series
actiniform
actinism
actinium
actinium series
actino-
actinograph
actinoid
actinolite
actinology
actinometer
actinomorphic
actinomycete
actinomycin
actinomycosis
actinon
actinouranium
actinozoan
ACTION
action painting
actionable
Actium
activate
activated carbon
activator
active
active duty (or service)
active immunity
activism
activity
activity series
activize
actomyosin
Acton
actor
actress
Acts
actual
actual sin
actuality
actualize
actually
actuarial
actuary
actuate
acuate
Acuff
acuity
aculeate
aculeus
acumen
acuminate
acupressure
acupuncture
acute
acute accent
ACV
-acy
acyclic
acyclovir
acyl
acyloin
ad-
ad astra per aspera
ad extremum
ad fin.
ad hoc
ad hominem
ad infinitum
ad initium
ad interim
ad lib. or ad libit.
ad libitum
ad litem
ad litteram
ad loc.
ad nauseam
AD or A.D.
ad rem
ad valorem
ad verbum
ad¹
-ad¹
ad²
-ad²
ad³
ADA
Ada¹ or Adah
Ada²
adactylous
adage
adagio
Adam
Adam-and-Eve
adamant
adamantine
Adamite
Adams
Adam's apple
Adam's needle
adamsite
Adana
Adapazari
adapt
adaptable
adaptation
adapter or adaptor
adaption
adaptive
Adar
Adar Sheni
adaxial
ADC
add
Addams
addax
addend
addendum
adder¹
adder²
adder's-mouth
adder's-tongue
addict
addiction
addictive
adding machine
Addis Ababa
Addison
Addison's disease
addition
additional
additive
additive inverse
addle
addlebrained
add-on
address
addressee
Addressograph
adduce
adducent
adduct
adduction
Ade
-ade
Adela
Adelaide
Adelbert
Adele
Adélie Coast
Adeline
ademption
Aden
aden-
Adenauer
adenine
adenitis
adeno-
adenocarcinoma
adenoid
adenoidal
adenoidectomy
adenoids
adenoma
adenosine
adenosine diphosphate
adenosine triphosphate
adenosis
adenovirus
adept
adequacy
adequate
adhere
adherence
adherent
adhesion
adhesive
adhesive tape
adhibit
adiabatic
adiaphorous
adieu
Adige
adios
adipocere
adipose
adiposity
Adirondack Mountains
adit
Adj
Adj Gen
adjacency
adjacent
adjacent angles
adjectival
adjective
adjoin
adjoining
adjourn
adjournment
adjudge
adjudicate
adjudication
adjunct
adjunctive
adjuration
adjure
adjust
adjustive
adjustment
adjutancy
adjutant
adjutant general
adjuvant
Adler
ad-lib
Adm
adm or admin
adman
admass
admeasure
admeasurement
Admetus
administer
administrate
administration
administrative
administrator
admirable
admiral
admiralty
Admiralty Islands
admiration
admire
admissible
admission
Admission Day
admit
admittance
admittedly
admix
admixture
admonish
admonition
admonitor
admonitory
adnate
adnexa
ado
adobe
adobo
adolescence
adolescent
Adolph
Adonai
Adonis
adopt
adoptive
adorable
adoration
adore
adorn
adornment
Adorno
Adowa
adown
ADP
Adrastus
adrenal
adrenal gland
Adrenalin
adrenergic
adreno-
adrenochrome
adrenocortical
adrenocorticotropic
adrenocorticotropic hormone
Adriamycin
Adrian
Adrianople
Adrianopolis
Adriatic (Sea)
Adrienne
adrift
adroit
adscititious
adscript
adscription
adsorb
adsorbate
adsorbent
adsorption
adsuki bean
adularia
adulate
adult
adulterant
adulterate
adulterated
adulteration
adulterer
adulterine
adulterous
adultery
adumbral
adumbrate
aduncate
adust
Aduwa
adv
advance
advance guard
advance man
advanced
advanced credit (or standing)
advancement
advantage
advantageous
advection
Advent
Advent Sunday
Adventism
Adventist
adventitia
adventitious
adventive
adventure
adventurer
adventuresome
adventuress
adventurism
adventurous
adverb