clea - comb
- clean
- clean aircraft
- clean airframe
- clean configuration
- clean energy
- clean fuel burning
- clean wing
- cleaner
- cleanness
- cleanup
- clear
- clear day
- clear description
- clear ice
- clear sky
- clear zone
- clear-air turbulence
- clearance
- clearance antenna
- clearance array
- clearance aspects
- clearance distance
- clearance facilityies
- clearance formalities
- clearance guidance
- clearance guidance sector
- clearance limit
- clearance message
- clearance of goods
- clearance of obstacles
- clearance of the aircraft
- clearance void time
- cleared aircraft
- clearing
- clearway
- clearzone
- clerk
- climate
- climatic hazard
- climatic spacecraft
