Crossed over is a phrase used to describe going from one side to another, or moving from one state or condition to another. The word 'crossed' is often used as an analogy for bridging the gap between two points, while 'over' emphasizes a change or transition. Some synonyms for crossed over include transitioned, migrated, shifted, changed, transformed, and progressed. These words are often used to indicate a significant move from one state of being to another, or a shift in perspective or mindset. Whether it is a physical or metaphorical crossing over, these synonyms help to convey a sense of transformation and growth.