What is another word for wake up call?
Pronunciation: [wˈe͡ɪk ˌʌp kˈɔːl] (IPA) 
A "wake up call" is a phrase generally used to describe an event or experience that brings someone abruptly back to reality after a period of complacency or denial. There are several synonyms for this term that can be used depending on the context. One such alternative is a "reality check," which similarly jolts someone out of a certain mindset or illusion. Another synonym is a "warning shot," which implies that a situation has become serious enough to warrant attention. A "rude awakening" is another expression that conveys the sudden shift in perspective that comes with a wake-up call. Ultimately, any of these synonyms can be used to describe a moment of clarity that forces someone to confront something they may have been ignoring.
