- acetic ether
- acetylene burner
- abamurus
- abat-jour
- abatis
- abatis dike
- abbey
- aberration
- Abney level
- abnormal wear
- about-sledge
- above-estimate
- above-plan
- abrasion cutting
- abrasive aggregates
- abrasive tile
- abrasivity
- absence
- absent
- absolute elongation
- absolute filter
- absorb
- absorber
- absorption chamber
- absorption thickness
- absorptive soil
- absorptivity
- abstract information
- abutment hinge
- abutment pier
- abutment ring
- abutment stone
- abutting
- abutting joint
- abutting tenons
- abyssinian well
- academism
- accelerated drying
- accelerated lane
- abrasion
- abrasion platform
- abrasiveness
- absolute deflection
- absolute misclosure
- absolute record
- absolute transmissibility
- absorbing
- absorbing boom
- absorbing column
- absorption field
- absorption losses
- absorption surface
- absorption test
- absorption trench
- absorptive
- absorptive forms
- abstract data
- abstract model
- abstraction
- abut face
- abutment pressure
- abutment zone
- abyssal depeter
- abyssal zone
- academy
- accelerate
- accelerated hardening
- accelerated weathering
- acceleration
- acceptance contract
- access control
- access opening
- access road
- accessible duct
- accident
- accident crane
- accident hazard
- accident rate
- accidental error
- accidental loading
- acclivity
- accolade
- accommodating heating
- accommodation road
- accordion door
- accountable
- accreting bank
- accelerated shift
- accelerated vector
- accelerator
- accepted bid
- access
- access chamber
- access gallery
- access option
- access permission
- access plate
- access radius
- access time
- accidental alarm