When it comes to discussing legal matters, using the appropriate terminology is crucial. In many cases, one may need to refer to an entity that has the most jurisdictional power in a given area. In such instances, using synonyms for the phrase "most jurisdictional" can help one communicate effectively. Some synonyms for this phrase may include words such as authoritative, predominant, dominant, controlling, and supreme. Each of these words conveys a sense of power and control, making them appropriate for use in legal discussions. By utilizing these synonyms for "most jurisdictional," one can better articulate the concept of legal authority to others.