"Are in power" is a phrase commonly used to describe those who hold positions of authority or influence in a particular setting or context. There are several synonyms that can be used to convey the same meaning, such as "hold sway," "dominate," "rule," "reign," "govern," "control," "command," and "preside over." Each of these words emphasizes the idea of having authority and power over a specific domain, whether it is a nation, an organization, or a group of people. Using these synonyms can help add variety and depth to one's vocabulary, and convey an even more precise and nuanced meaning when used in the appropriate context.