Arbitrates, the act of settling a dispute or conflict between two parties in a just and unbiased manner has several synonyms that can be used interchangeably in a sentence or a conversation. Some of the synonyms for arbitrate include mediate, negotiate, referee, adjudicate, settle, resolve, and moderate. Each of these words has a slightly different connotation, but they are all related to the act of solving a dispute or reaching an agreement between two or more parties. Whether it's a legal decision, a personal conflict or a business deal, finding the right word to describe the act of arbitration can be helpful in communicating your point of view clearly and succinctly.