There are several synonyms for the phrase "seat authority," which refer to the act of asserting or establishing power or control over a particular situation or group of people. Some commonly used synonyms include "assert leadership," "establish dominance," "take charge," "assume control," and "seize command." These phrases can be used in a variety of contexts, from workplace situations to personal relationships, and are often associated with qualities like confidence, assertiveness, and decisiveness. Whether you are looking to inspire your team or assert your own authority, using one of these synonyms can help you communicate your intentions clearly and effectively.