The term 'PERSON WHO GOVERNS' can be summarized as a 'RULER', which is a five-letter word. A RULER is a person who has the power to govern, make laws, and enforce them. This type of person is usually found in a monarchy or other form of government, where they have the authority to make decisions for their people. They are often seen as a symbol of power and authority, and their decisions can have a major impact on the lives of their citizens.