When we talk about things that revolve about a particular topic or subject, it often indicates that the conversation or discussion revolves around that one central idea. There are many words which can be used in place of "revolve about," to indicate a similar meaning, some of which include "center around," "focus on," "concentrate on," "revolve around," "revolve upon," "circle around," and "orbit around." These synonyms can be helpful in providing alternative ways to describe the central theme of a conversation and can also be used when writing to avoid repetition and add more varied sentence structures for clarity.