There are several synonyms for the phrase "walk out of." One common substitute is "leave" which implies departing from a place or situation. "Exit" is another alternative, suggesting a formal departure. "Abandon" conveys a sense of leaving something behind, often a project or relationship. "Flee" is a more urgent term, evoking a sense of escape or running away from danger. "Vacate" is a formal term that can be applied to homes, apartments, or other properties. "Depart" is a broad term that can be used in many situations, while "withdraw" implies a deliberate and calculated decision to leave. All of these synonyms suggest a different reason for leaving, but they all convey a sense of leaving one situation behind and moving on to something else.