Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun clearance

3 senses of clearance

Sense 1
clearance -- (the distance by which one thing clears another; the space between them)
       => interval, separation -- (the distance between things; "fragile items require separation and cushioning")

Sense 2
headroom, headway, clearance -- (vertical space available to allow easy passage under something)
       => room, way, elbow room -- (space for movement; "room to pass"; "make way for"; "hardly enough elbow room to turn around")

Sense 3
clearance -- (permission to proceed; "the plane was given clearance to land")
       => license, permission, permit -- (the act of giving a formal (usually written) authorization)