Contravener refers to a violator or a person who goes against a law, rule, or agreement. There are several synonyms for this term, including transgressor, offender, lawbreaker, delinquent, renegade, rebel, dissident, insurrectionist, and mutineer. These synonyms have a slightly different tone and connotation, but they all refer to someone who behaves in a way that is contrary to what is expected or lawful. Other words that can be used as synonyms of contravener include trespasser, infringer, defier, and noncompliant. Regardless of the specific term used, referring to someone as a contravener implies that they have acted in a manner that is considered inappropriate or unacceptable.