Rear window is a term used to refer to the back window of a car or any other vehicle that is used for viewing. In order to avoid repetition in written or spoken communication, it is important to have a range of synonyms to describe a rear window. Some of the synonyms that can be used to describe a rear window include back window, rear windshield, rear screen, back glass, and rear view glass. Other variations may include "rear windowpane," or "rear window shield." These synonyms help to add variety to speech and written communication as well as to create a more interesting narrative.