control tower 
noun
A tall building at an airport from which the movements of air traffic are controlled.Yes, pilots can control the lights at some airports where the control tower is not always staffed or at those with no tower at all....
- In the meantime, he finished the pre-flight checks with the control tower at Reagan National Airport.
- The pilot circled the airport several times so the control tower could discern if the landing gear had been deployed.
- conscientization
- conscientize
- consciently
- conscionable
- conscionableness
- conscionably
- conscious
- consciously
- consciousness
- consciousness-expanding
- consciousness-raiser
- consciousness-raising
- conscribe
- conscript
- conscription
- conscriptional
- conscriptionist
- conscriptive
- consecrate
- consecration
- consecrator
- consecratory
- consecutive
- consecutively
- consecutiveness