A tagline is a catchy phrase that captures the essence of a brand or product. There are various synonyms for the word tagline, such as slogan, motto, catchphrase, strapline, theme, mantra, and battle cry. Slogan and motto are perhaps the most commonly used synonyms for tagline, but catchphrase is also a popular option. Strapline and theme are more specific and often used in advertising and marketing contexts. Mantra and battle cry are more powerful and motivational synonyms for tagline. Whatever the word used, it should convey a clear and memorable message that represents the brand or product it represents.