There are a few commonly used synonyms for the term "false arrest" that can help to convey the concept of being unlawfully detained. One such term is wrongful arrest, emphasizing that the arrest was not justified or legal. Another possible synonym is false imprisonment, which suggests that the person was not only arrested, but also held against their will without just cause. In some cases, the term false detention may also be used to describe a situation in which someone is held without proper legal authority. Regardless of the terminology used, false arrest is a serious violation of a person's rights and can have significant legal consequences for those responsible.