Airspaces rhymes with:
aerospace's, cyberspace's, aerospace's, cyberspace's, outpaces, aerospace's, birthplaces, bookcases, briefcases, cyberspace's, databases, interfaces, marketplace's, marketplaces, outpaces, showcases, staircases, suitcases, workplaces
Airspaces sounds like:
aerospace, aerospace's, airships, airspace, archibeque, archives