The word "brainier" refers to someone who is more intelligent or clever than others. However, there are several other words that can be used as synonyms for brainier. For example, "smarter," "wiser," "brighter," "more astute," "more knowledgeable," and "more insightful" are all options that convey a similar meaning to brainier. Other potential synonyms for brainier include "more intellectual," "more cerebral," "more erudite," and "more scholarly." Each of these words can be used to describe someone who possesses a high level of intelligence, cognitive ability, and mental agility. Choosing the right synonym for "brainier" can help to add interest and variety to your writing, while also conveying a precise meaning.