orga - para
- overall specific impulse
- overall thermal efficiency
- overall thrust
- overall trajectory
- overall view
- overalls
- overbalance
- overboard vent
- overbridge
- overcast
- overcast bombing
- overcenter
- overcharged mine
- overcooled engine
- overdue
- overflight
- overflight interdiction
- overflight scanning pattern
- overflow
- overflow of register
- overflow outlet
- overflow trap
- overgear
- overhang balance
- overhaul
- overhaul and repair
- overhaul report
- overhead
- overhead clearance
- overhead crane
- overhead crossing
- overhead fire demonstration
- overhead line
- overhead loading
- overhead screen
- overheat protection
- overheating
- overkill capability
- overkill capacity
- overkilled target
