- avidly
- avidya
- avifauna
- avigation
- avionics
- aviophobia
- avirulent
- aviso
- avitaminosis
- avizandum
- avn
- avn.
- avo
- avocado
- avocado toast
- avocation
- avocet
- avodire
- avoid
- avoid like the plague
- avoidance
- avoidance play
- avoidant
- avoirdupois
- avoirdupois weight
- avolition
- avouch
- avow
- avowal
- avowed
- avowry
- avruga
- avulse
- avulsion
- avuncular
- avunculate
- aw
- aw-shucks
- awa
- awa'
- await
- awake
- awaken
- awakening
- award
- award wage
- awardee
- aware
- awareness
- awareness bracelet
- awash
- awato
- away
- away goal
- away-going crop
- awayday
- awe
- awe-inspiring
- aweary
- aweather
- awed
- aweigh
- aweless
- awesome
- awesomesauce
- awestruck
- aweto
- awful
- awfully
- awhato
- awheel
- awhile
- awhirl
- awkward
- awkward age
- awl
- awl snail
- awl-shaped
- awless
- awlwort
- awmous
- awn
- awner
- awning
- awning deck
- awning window
- awnless bromegrass
- awoke
- awry
- awsome
- ax
- ax job
- ax to grind
- ax-
- ax.
- axanthopsia
- axe
- axe-breaker
- axebird
- axel
- axeman
- axenic
- axes
- axi-
- axial
- axial skeleton
- axial strain
- axial stress
- axial vector
- axial-flow
- axial-flow compressor
- axil
- axile
- axilemma
- axilla
- axillar
- axillary
- axillary bud
- axinite
- axiological
- axiological ethics
- axiology
- axiom
- axiom of choice
- axiom of countability
- axiomatic
- axion
- axis
- axis deer
- axis of evil
- axis of revolution
- axis of symmetry
- axisymmetric
- axle
- axletree
- axman
- axo-
- axolemma
- axolotl
- axon
- axoneme
- axonometric
- axonometric projection
- axonometry
- axoplasm
- axseed
- ay
- ayah
- ayahuasca
- ayatollah
- aye
- aye-aye
- ayin
- aykhona wena
- ayont
- ayous
- ayr stone
- ayuntamiento
- az
- az-
- az.
- aza-
- azalea
- azan
- azathioprine
- azedarach
- azeotrope
- azerty keyboard
- azide
- azido
- azido group
- azidothymidine
- azimuth
- azimuth bar
- azimuth circle
- azimuthal equidistant projection
- azimuthal projection
- azimuthal quantum number
- azine
- azine dye
- azlon
- azo
- azo dye
- azo group
- azo-
- azobenzene
- azoic
- azoic dye
- azoimide
- azole
- azonal
- azonal soil
- azonic
- azoospermia
- azophenylene
- azotaemia
- azote
- azotemia
- azoth
- azotic
- azotize
- azotobacter
- azoturia
- azo–
- azulejo
- azure
- azurite
- azurmalachite
- azygospore
- azygous
- azyme
- açaí
- aérogramme
- aïoli
- añu
- aˈbatement
- aˈvidity
- aˈvoidance
- aˌpocaˈlyptic
- aˌromaˈticity
- a̅a̅
- a quo
- a–