The term 'power to control' can be summarized by two crossword solutions: 'AUTHORITY' (9 letters) and 'REINS' (5 letters). AUTHORITY is the right to make decisions, enforce rules, and give orders. It is often associated with a position of leadership or responsibility. REINS are figurative control or influence over someone or something. They are often used to refer to the power of a leader or government to direct the actions of its citizens.