When something is "cracked wide open," it means it has been exposed or revealed completely. Some synonyms for this phrase include uncovered, unmasked, revealed, exposed, disclosed, unveiled, laid bare, and bared. These words all suggest that something hidden or secret has been made public knowledge. Other words that can be used include shattered, broken, split, and ruptured, which convey a sense of something being literally or metaphorically shattered or destroyed. Regardless of the context in which it is used, "cracked wide open" serves as a powerful metaphor for the idea of exposing something hidden and bringing it into the light.