"Leave no stone unturned" is a figurative expression that means exploring every possible avenue to achieve a goal or find a solution. There are several synonyms for this phrase, such as "exhaust all possibilities," "leave nothing to chance," "go the extra mile," "leave no option unexplored," and "leave no avenue unexplored." All of these phrases convey the same message of thoroughness and determination to achieve a desired outcome. Whether it be solving a problem, pursuing a goal, or completing a task, these synonyms encourage a committed effort towards success by leaving nothing untouched or unexplored.