A hearing officer is someone who presides over a legal hearing and listens to evidence presented by both sides before making a decision. Other terms that can be used synonymously include an adjudicator, arbitrator, judge, magistrate, or mediator. Each of these terms has slightly different connotations or is specific to certain legal contexts. A judge, for example, typically presides over a courtroom and has the power to issue legally binding rulings and sentences. A mediator, on the other hand, is a neutral party who helps facilitate communication between opposing parties to reach a mutually beneficial resolution. Ultimately, the synonym you use may depend on the specific type of court or hearing, as well as the roles and responsibilities of the individual presiding over it.