From Longman Dictionary of Contemporary Englishair freshenerˈair ˌfreshener noun [countable, uncountable] CODHa substance or object used to make a room smell pleasant
Examples from the Corpus
air freshener• Is there a check that the windows are open and air freshener blocks in place?• Perfume the bedroom with an auto air freshener.• Instead the room was light and airy, lit by fluorescent lights and smelling pleasantly of air freshener. 