When it comes to identifying someone who holds power or has control over others, there are plenty of synonyms for the term "person in authority." Some common alternatives include "leader," "supervisor," "boss," "manager," "commander," "chief," "ruler," and "governing figure." Other related phrases might include "power player," "head honcho," "top dog," or "big cheese." Depending on the context, the appropriate term might vary; for example, a hierarchical organization might refer to a person in authority as "the higher-ups," while a political system might use terms such as "official" or "representative." Ultimately, the most important thing is to use clear and consistent language when referring to those who hold positions of power.