oper - out-
- operate
- operated
- operating
- operating aerodrome
- operating agency
- operating altitude
- operating availability
- operating ceiling
- operating channel
- operating characteristic
- operating conditions
- operating correction factor
- operating cost
- operating crew
- operating current
- operating cycle
- operating data
- operating duty
- operating efficiency
- operating expences
- operating facilityies
- operating frequency
- operating income
- operating instruction
- operating lease
- operating life
- operating life reduction
- operating limitations
- operating load
- operating load factor
- operating loss
- operating maintenance
- operating manual
- operating permit
- operating personnel
- operating power
- operating pressure
- operating profit
- operating regime
- operating repair
