Carjacker, a term used to refer to a person who steals a motor vehicle by threatening or attacking its driver, can be replaced with several other words. Some synonyms for carjacker include auto thief, vehicle robber, hijacker, car thief, or motor vehicle pirate. Each of these replacements refers to someone who perpetrates the act of stealing a vehicle for personal gain, usually for joyriding, rushing to the scene of a crime, theft of contents, or selling the stolen vehicle. When describing someone who commits this crime, it's important to use appropriate terms that accurately reflect their actions and behaviors.