The word "baddies" is often used to describe villains or antagonists. However, there are many synonyms that can be used to describe these types of characters, including "villains," "antagonists," "adversaries," "foes," "opponents," "rivals," "enemies," and "wrongdoers." Each of these words conveys a slightly different tone or emphasis, and can be used effectively depending on the context and mood of the story. Additionally, alternative phrases such as "evil-doers" or "malefactors" can be used for a more formal or serious tone, while "bad guys" or "ne'er-do-wells" bring a more casual or lighthearted feel to the language.