The expression "battle of brains" denotes a competition between two or more individuals with an intense intellectual challenge. There are various synonyms for this term that could help to diversify our vocabulary and express the same idea with more precision. Some of these synonyms include brain teaser, mental duel, cerebral contest, intellectual combat, cognitive clash, minds challenge, and intelligence competition. Each of these synonyms has a unique connotation that could adapt to different situations and audiences. Using synonyms enriches communication and allows us to communicate our ideas with more accuracy and impact.