- ascidial
- ascidian
- ascidium
- asciferous
- ascites
- asciti fluid
- ascitic
- asclepiadaceous
- ascocrap
- ascogenous
- ascogone
- ascogony
- ascolichens
- ascoma
- ascomycetes
- ascorbic
- ascospore
- ascot
- ascribable
- ascribe
- ascription
- ascular nevus
- ascus
- asdic
- asean
- aseanpol
- asecndingnode
- aseismic
- aseismic building
- aseismic district
- aseismic joint
- aseismic section
- aseismic structures
- asemic
- asepsis
- aseptate
- aseptic
- aseptic block
- aseptic canning
- aseptic infarct
- aseptic package
- aseptic worm
- asequent landside
- asexual
- asexual cycle
- asexual dwarf
- asexual generation
- asexual reproduction
- asexuality
- ash
- ash analysis
- ash blonde
- ash cake
- ash can
- ash cell
- ash coal
- ash collector
- ash concrete
- ash cone
- ash content
- ash cooler
- ash determination
- ash discharge
- ash door
- ash fall
- ash furnace
- ash grate
- ash layer
- ash percentage
- ash plant
- ash rain
- ash removal
- ash remover
- ash rock
- ash silo
- ash stop
- ash test
- ash wednesday
- ash-bin
- ash-box
- ash-coloured
- ash-fire
- ash-pan
- ash-pit
- ash-pot
- ash-stand
- ash-tray
- ashake
- ashamed
- ashcan
- ashen
- ashes
- ashet
- ashlar
- ashlar arch
- ashlar brick
- ashlar facing
- ashlar masonry
- ashlar pier
- ashlar stone