Outbrazen means to act in an unashamed or audacious way. When it comes to synonyms for the word, there are a few options to choose from. One option is to use the word "boldly" as a replacement for outbrazen. Another synonym for outbrazen is "unabashed" which means to act without shame or embarrassment. The word "impudent" can also work as a synonym for outbrazen, as it implies a certain level of disregard for social norms. "Brazen" itself could work, as it carries a similar connotation to outbrazen but without the added prefix. Overall, there are several great synonyms for outbrazen depending on the context and tone desired.