Tubthumping refers to the act of promoting or defending a belief or idea in an aggressive or persistent manner. Some synonyms for tubthumping include fervor, zealotry, intensity, and advocacy. Other similar terms include proselytizing, evangelism, indoctrination, and propaganda. These words all suggest a dedicated and energetic commitment to a particular cause. On the other end of the spectrum, antonyms for tubthumping include indifference, apathy, and neutrality. While being passionate about a belief can be admirable, tubthumping can also lead to closed-mindedness and an ignorance of alternative viewpoints. It is important to balance conviction with an openness to consider other ideas.