- actual displacement
- actual loading
- actual state
- actual status
- actual Strength
- actual stress
- actual throat
- actual work
- actualize
- actuary
- actuator
- acuity
- acuminated roof
- acute arch
- ad hoc
- acidification
- acierated rail
- acoustic
- acoustic block
- acoustic correction
- acoustic design
- acoustic disturbance
- acoustic field
- acoustic generator
- acoustic hood
- acoustic lining
- acoustic mass
- acoustic method
- acoustic screen
- acoustic tile
- acoustic treatment
- acoustical block
- acoustical ceiling
- acoustical door
- acoustical panel
- acoustical partition
- acoustical refraction
- acoustical screen
- acoustics
- acquire
- acquisition
- acquisition editor
- acropolis
- across bulkhead
- acting level
- actinic glass
- action
- action effect
- actual GNP
- actual load
- actual test
- actuating mechanism
- acuate arch
- acud
- adamant
- adapt
- adapter lens
- adapting tee
- add-in
- addition
- additional charges
- additional element
- additional mass
- additional prestressing
- additional tension
- additive
- additive cement
- adept
- adesite
- adhere
- adherence
- adherent
- adhesion strength
- adhesion weight
- adhesive ability
- adhesive film
- adhesive mastic
- adhesive moisture
- adjacent pier
- adjacent structure
- adjoin
- adjoining house
- adjoining point
- adjoining rock
- adjust
- adjustable clearance
- adjustable prop
- adjustable shore
- adjuster cotter
- adjusting bolt
- adjusting dimension
- adjusting jack
- adjusting roll
- adjusting wedge
- adjustment speed
- admeasurement
- administered price
- administrative
- administrative area
- administrative block