- artificial radioactivity
- artificial respiration
- artificial selection
- artificial turf
- artificiality
- artificialize
- artillery
- artillery plant
- artilleryman
- artio-
- artiodactyl
- artisan
- artisanal
- artist
- artiste
- artistic
- artistic director
- artistry
- artless
- artmobile
- artophorion
- artotype
- arts
- arts and crafts
- artsy
- artsy-craftsy
- artsy-fartsy
- artware
- artwork
- arty
- arty-crafty
- arty-farty
- arugula
- aruhe
- arum
- arum family
- arundinaceous
- aruspex
- arvo
- ary
- aryballos
- aryballus
- aryepiglottic
- aryl
- aryl group
- arylamine
- arylate
- arytenoid
- arête
- arˈticuˌlator
- arˈtistic
- as
- as . . . as
- as I live and breathe
- as a matter of course
- as a matter of fact
- as a rule
- as a whole
- as all getout
- as best one can
- as big as life
- as far as
- as far as I can see
- as far as possible
- as far as that goes
- as follows
- as for
- as good as
- as if
- as is
- as it were
- as likely as not
- as long as
- as luck would have it
- as many
- as much
- as much as
- as of
- as one
- as per
- as regards
- as soon
- as soon as
- as such
- as the crow flies
- as though
- as to
- as usual
- as well
- as well as
- as yet
- as you please
- as-
- as-live
- as-told-to
- asafetida
- asafoetida
- asalam-wa-leikum
- asana
- asarabacca
- asarotum
- asarum
- asb.
- asbestos
- asbestos cement
- asbestosis
- asc-
- ascared
- ascariasis
- ascarid
- ascaridole
- ascaris
- ascend
- ascendancy
- ascendant
- ascender
- ascendeur
- ascending
- ascending colon
- ascending node
- ascension
- ascensionist
- ascensive
- ascent
- ascertain
- ascesis
- ascetic
- asceticism
- aschelminth
- asci
- ascidian
- ascidium
- ascigerous
- ascites
- asclepiadaceous
- asclepias
- asco-
- ascocarp
- ascogenous
- ascogonium
- ascoma
- ascomycete
- ascomycetous
- ascon
- asconoid
- ascorbate
- ascorbic acid
- ascospore
- ascot
- ascribe
- ascribed status
- ascription
- ascriptive
- ascus
- asdic
- asea
- aseismic
- aseity
- asemia
- asepalous
- asepsis
- aseptate
- aseptic
- aseptic meningitis
- asexual
- asexual reproduction
- asexuality
- asexualize
- asgd.
- asgmt.
- ash
- ash blond
- ash can
- ash fall
- ash flow
- ash gray
- ash-blond
- ashake
- ashamed
- ashcake
- ashcan
- ashcan school
- ashen
- ashen light
- ashes
- ashet
- ashkey
- ashlar
- ashlar line
- ashlaring
- ashman
- ashore
- ashpit
- ashplant
- ashram
- ashtray
- ashy
- asiago
- aside
- aside from
- asiderite
- asinine
- ask
- ask a stupid question and you'll get a stupid answer
- ask after
- ask for
- ask for the moon
- ask out
- askance
- askarel
- askari
- askew
- asking bid
- asking price
- askos
- asl
- aslant
- asleep
- asleep at the switch
- aslope
- aslosh
- asocial
- asomatous
- asonia
- asp
- asparaginase
- asparagine
- asparaginic acid
- asparagus
- asparagus bean
- asparagus beetle
- asparagus fern
- aspartame
- aspartate
- aspartic acid
- aspect
- aspect ratio
- aspectant
- aspectual
- aspen
- asper
- asperate
- aspergillosis
- aspergillum
- aspergillus
- asperity
- aspermia
- asperse
- aspersion
- aspersorium
- asphalt
- asphalt jungle
- asphalt paper
- asphalt rock
- asphaltene
- asphaltite
- asphaltum
- aspherical
- aspherical surface
- asphodel
- asphyxia
- asphyxiant
- asphyxiate
- asphyxiation
- aspic
- aspidistra
- aspirant
- aspirata
- aspirate
- aspiration
- aspirational
- aspirator
- aspiratory
- aspire
- aspirin
- aspiring
- asplanchnic
- asplenium
- asportation
- asprawl
- aspro
- asquint
- asrama
- ass
- ass in a sling, have one's
- ass-kick
- ass-kissing
- ass.
- assagai
- assai
- assail
- assailant
- assalamu alaikum
- assam
- assassin
- assassin bug
- assassin fly
- assassinate
- assassination
- assault