- overflow channel
- overflow chute
- overflow dam
- overflow gate
- overflow height
- overflow length
- overflow pipe
- overflow section
- overflow spillway
- overflow spout
- overflow summit
- overflow surface
- overflow valve
- overflow weight
- overflow weir
- overgrade crossing
- overgrinding
- overground pilework
- overground pipeline
- overground storehouse
- overhand work
- overhang
- overhang crane
- overhang door
- overhanging beam
- overhanging length
- overhanging wall
- overhaul road
- overhauling
- overhead
- overhead carriage
- overhead caving
- overhead cistern
- overhead distribution
- overhead expense
- overhead grid
- overhead illumination
- overhead laying
- overhead lighting
- overhead line
- overhead monorail
- overhead pipe
- overhead valve
- overhead welding
- overirrigation
- overlapping flights
- overlapping joint
- overlay pavement
- overleap joint
- overload
- overload provision
- overlying ground
- overman
- overpass
- overpopulation
- overradiator board
- overrunning clutch
- oversanded cement
- oversanded mix
- oversize brick
- overspray
- overstrain
- overstrained
- overstressing
- overtaking lane
- overtensioned
- overtime
- overtime work
- overturning failure
- overtype
- ovoid
- ovoid pipe
- ovum
- owner occupancy
- oxidation
- oxidation column
- oxidization
- oxidized bitumen
- oxidizing capacity
- oxisols
- oxy tank
- oxyacetylene blowpipe
- oxyacetylene cutting
- ozokerit
- ozone treatment
- ozonizing chamber
- pace
- pack
- package
- package bench
- package hoisting
- package unloading
- packed soil
- packer
- oxygen plant
- pacing
- package lifting
- packaged
- packaged boiler
- packaging