When it comes to finding synonyms for the word "catchier", several alternatives spring to mind. One possible substitute is "snappier", which conveys a sense of quickness and liveliness. Another option could be "grabber", evoking the idea of something that instantly captures attention. For a more dynamic term, "engaging" is ideal, implying involvement and captivating qualities. Furthermore, "memorable" serves as a synonym suggesting something that stays with you long after encountering it. Alternatively, "appealing" expresses a strong allure or attraction. Finally, "infectious" showcases the contagious nature of a catchy phrase or tune, suggesting it spreads rapidly to captivate others.