When it comes to acting, there are many synonyms for the term "play-act." Depending on the context, you might use words like "pretend," "dramatize," or "perform." If you're talking about a more casual type of acting, you could also use words like "improvise" or "ad-lib." On the other hand, if you're talking about a more formal or scripted performance, synonyms like "act out" or "rehearse" might be more appropriate. Overall, there are many different synonyms for "play-act" depending on the situation, tone, and level of intensity involved in the performance.