Acting out is a term used to describe a person's behavior when they express their emotions or impulses through actions rather than communicating verbally. Some synonyms for acting out include misbehaving, acting up, and being unruly. Other synonyms can include displaying inappropriate behavior, having a tantrum, or throwing a fit. In some cases, acting out can indicate an underlying issue that needs to be addressed, such as anxiety, depression, or trauma. It can also be a sign of a lack of appropriate coping skills or difficulty regulating one's emotions. It is important to recognize when someone is acting out and provide support or seek professional help if necessary.