The phrase "there and back" is commonly used to describe a journey or trip where one goes to a destination and returns to their starting point. Some possible synonyms for this phrase could include "round trip," "journey there and back," "out and back," "roundabout," "full cycle," "circular route," or "complete circuit." Each of these phrases captures the idea of a complete journey from point A to point B and back again, emphasizing the idea of a full or comprehensive experience. Whether you're discussing travel routes or personal growth, these synonyms can add variety and depth to your language.