- alder swamp
- alette
- alidale
- align
- aligning
- aligning pole
- aligning tool
- alignment
- alignment device
- alignment equipment
- alignment wire
- alite
- alite cement
- alkali resistance
- alkaline corrosion
- alkaline emulsion
- alkaline soil
- alkyd paint
- all components
- all-welded
- alley
- allitic soil
- allowable amplitude
- allowable displacement
- allowable heeling
- allowable leakage
- allowable moisture
- allowable strength
- allowable stress
- allowance
- allude
- alluvial clay
- alluvial fan
- alluvial gold
- alluvial sand
- alluvial soil
- alluvial valley
- almonry
- almost all
- alone
- along
- alongside
- aloof
- alpha hinge
- alphabetically
- alphanumeric code
- alpine relief
- altar
- altar tomb
- altar zail
- alteration
- alternate
- alternate depths
- alternate design
- alternate joint
- alternate key
- alternate layout
- alternate load
- alternate roadway
- alternate strain
- alternate strength
- alternate stress
- alternate stresses
- Alternated Bid
- alternately
- alternating cycle
- alternating deformation
- alternating load
- alternating stress
- alternating stresses
- alternative
- alternative line
- alternative route
- alternative stresses
- alternator
- although
- altimetric survey
- altimetry
- altitude chamber
- altitude circle
- altitude gauge
- altitude scale
- alto-relievo
- alum clay
- alum earth
- alum schist
- alumina brick
- alumina cement
- alumina filter
- alumina modulus
- alumina refractory
- aluminate
- aluminates
- aluminates cement
- aluminates concrete
- aluminium alloys
- aluminium brass
- aluminium door
- aluminium form
- aluminium nails