Impeacher is a term that refers to a person who accuses someone of high crimes and misdemeanors. There are several synonyms for this term that can be used to describe a person who accuses someone of wrongdoing. Some of the most common synonyms for impeacher include prosecutor, accuser, indictor, and critic. Each of these words has a slightly different connotation, but they all convey the same basic idea - that someone is being accused of doing something wrong. Regardless of which word is used, the implication is that someone is being held accountable for their actions, and that justice is being served.