When it comes to describing a topic that is the central point or focus of a discussion, the phrase "revolves on" may be too repetitive or overused. Thankfully, the English language provides us with many synonyms that can be used instead. Some examples of possible alternatives include: centers around, hinges on, depends on, is grounded in, is based on, is focused on, is rooted in, or is driven by. Each of these phrases offers a slightly different shade of meaning, allowing you to choose the one that best fits your context and intention. By using a wide range of synonyms, you can keep your writing fresh, interesting, and engaging.