The phrase "heads for the hills" is often used to describe someone fleeing or seeking safety from danger or trouble. There are several other synonyms that can be used interchangeably with this phrase. One popular alternative is "takes flight," which conveys a sense of urgency and quick movement away from a situation. "Flees" also carries a similar urgency, but implies a sense of cowardice or fear. "Escapes" suggests a successful departure from danger, while "evacuates" signifies a more organized and planned exit. "Retreats" implies a strategic withdrawal from a situation, while "flees for safety" emphasizes the need for protection. Overall, the use of these synonyms can add variety and depth to written or spoken communication.