Crack open is a phrasal verb that means to open something by breaking it slightly or to open something that is partially closed. There are several synonyms for crack open which can be used in different contexts. For example, pop open is a synonym that is commonly used to describe opening a can or bottle. Prise open is used to describe opening something by using a tool or lever. Split open is used when something breaks apart and opens up. Finally, wedge open describes the act of forcing something open using a wedge or other object. These synonyms can be useful for writers who want to add variety to their writing or avoid repetition.