Disappearing acts refer to the actions of someone suddenly leaving, becoming absent or vanishing without any trace. Some synonyms that can be utilized to describe similar actions include evanescence, fading away, vanishing act, slipping away, dematerialization, disappearing without a trace, and fading into thin air. Other synonyms are disappearing without warning, going AWOL, or pulling a Houdini. Regardless of the phrase or synonym used, these actions typically denote someone who has exited quickly and without any notice, often leaving those around them scrambling to understand what happened.