The term "was authority" can be used in multiple contexts and situations where there is a need to describe past authority or power. Synonyms for this expression could vary depending on the context, such as former authority, previous influence, or former power. Other alternatives could include past control, former command, or erstwhile dominance. Some instances may require more specific synonyms, such as retired leadership, expired ruling, or previous governance. Regardless of the purpose of the sentence or phrase, having a diverse range of synonyms for the word "was authority" can help writers to express their ideas clearly and effectively.