Airspace rhymes with:
aerospace, cyberspace, electrospace, innerspace, aerospace, cyberspace, electrospace, innerspace, outpace, aerospace, airbase, ambase, anyplace, birthplace, boldface, bookcase, bouillabaise, briefcase, broadbase, bucase, cityplace, commonplace, cyberspace, database, dbase, diabase, diastase, dnase, electrospace, everyplace, fireplace, footrace, innerspace, interface, lactase, lovelace, maltase, marketplace, orthoclase, outpace, parcplace, plagioclase, polymerase, reiterates, scarface, shoelace, showcase, showplace, someplace, staircase, steelcase, steeplechase, streptokinase, suitcase, sybase, typeface, wheelbase, workplace
Airspace sounds like:
aerospace, aerospace's, airships, airspaces, archibeque, archives