The phrase "is in control of"can be used interchangeably with other synonyms to better convey the intended meaning of the sentence. For example, words like govern, manage, supervise, oversee, direct, and command are some great substitutes for "is in control of". These words suggest a higher level of authority, leadership, and responsibility. Additionally, phrases like "has power over," "holds sway over," and "dominates" could also convey the same sense of being in charge. By using these synonyms for the word "is in control of," writers can add clarity and variety to their sentences, making their message more impactful and engaging.