- arching action
- architect
- architectural analysis
- architectural composition
- architectural conservation
- architectural element
- architectural environment
- architectural harmony
- architectural image
- architectural millwork
- architectural morphology
- architectural plane
- architectural project
- architectural semantics
- architectural sociology
- architectural style
- architectural vista
- architrave
- arcograph
- arcuated
- area light
- area school
- areal distributor
- arena
- argillaceous limestone
- argillaceous rock
- aridity
- aridness
- armor-plate
- armour
- arrester
- arris
- artful
- articulated connection
- articulated structure
- artificial cement
- artificial drying
- artificial marble
- artificial recharge
- artificial sky
- artillery
- artistic
- aseismic building
- aseismic section
- ash cone
- ashlar brick
- ashlaring
- aspect ratio
- asphalt fell
- asphalt finisher
- asphalt mastic
- asphalt paper
- asphalt paver
- asphalt plant
- asphalt primer
- asphalt spreader
- asphalt tar
- asphalt worker
- asphaltic revetment
- assembled drain
- assembly board
- assembly workshop
- assistance
- assisted bathroom
- astatic control
- astrogeodesy
- atmospheric air
- atmospheric change
- atmospheric conditions
- atmospheric effects
- atmospheric moisture
- atmospheric noise
- atomic lighthouse
- atomic shelter
- atrium
- attached column
- attached garage
- attachment
- attain
- attempt
- attend
- attenuate
- attenuation
- attenuation coefficient
- attenuator
- attest
- attic
- attic fan
- attic floor
- attic joist
- attic ladder
- attic order
- attic stairs
- attic stairway
- attic tank
- attic ventilator
- attic wall
- attraction
- attraction area
- attraction mod