- abate
- ability
- abrasion hardness
- abrasive acting
- abrasive belt
- abrasive machinery
- abrupt
- abruptness
- absolute calibration
- absorbent
- absorbent filter
- absorbing admixture
- absorption dynamometer
- abutment
- abutment joint
- abyssal depth
- accelerated ageing
- accelerating pump
- accelerator pedal
- access ramp
- accommodate
- accommodation
- account
- accumulated error
- accumulative area
- accurate method
- above par
- abrasive cutting
- abrupt curve
- abruption
- absolute azimuth
- absolute orientation
- abundance
- abundance ratio
- abutment pier
- abyss facies
- abrasive
- abrasive stick
- absolute acceleration
- absolute parallax
- absorbable
- abutment pressure
- acceleration lag
- acceptance stamp
- access opening
- accessible
- accessory shaft
- accident
- acclivous relief
- accelerator lever