- overall flexibility
- overall height
- overall length
- overall network
- overall planning
- overall size
- overall speed
- overall stiffness
- overall wear
- overall width
- overarch
- overbearing
- overbid
- overboard
- overbreak
- overbrim
- overbuild
- overburden
- overburden stripping
- overburdening
- overburning
- overburnt brick
- overcaution
- overcharge
- overcoat
- overcoating
- overconsolidated soil
- overcrossing
- overcrowding
- overcurrent
- overcurrent release
- overdamping
- overdoor
- overdraft
- overdraw
- overdrilling
- overdue liability
- osar
- oscillating agitator
- oscillating foundation
- oscillating load
- oscillating saw
- oscillation absorber
- oscillation acceleration
- oscillation amplitude
- oscillation mode
- oscillator
- oscillator machine
- oscilloscope
- osillogram
- osmose
- osmotic coefficient
- ossature
- out pour
- out pouring
- outbound traffic
- outbuilding
- outdated
- outdoor photography
- outdoor storage
- outdoor theatre
- outer belt
- outer connection
- outer edge
- outer lining
- outer overburden
- outer separation
- outer sleeve
- outer string
- outer support
- outerport
- outfall
- outfall sewer
- outflow furrow
- overhead traveler
- overheating
- overlap
- overlap siding
- overlapping
- overloading factor
- overlying strata
- overmodulation
- overnormative stock
- overpassivation
- overpressing
- overpressure
- overrun
- oversailing
- oversanded
- oversea investment
- overseas site
- oversite concrete
- oversize
- oversized
- overstorey
- overstress
- overstressed
- overtension
- overturned bedding
- overturning moment