Acting like someone or something else is a common way to mimic behavior, character or personality. Synonyms for 'act like' can include impersonate, embody, portray, simulate, represent, emulate, mimic, imitate, and behave as. Each of these words carries its own nuances, with some having a stronger emphasis on replication, while others focus on the embodiment of character. When selecting synonyms for "act like," it is important to consider the context of the sentence and the effect you're trying to achieve. Whether you're writing dialogue or describing a character's actions, choosing the right synonym can enhance the realism and depth of your writing.