When it comes to describing activities or actions that one is involved in, the phrase "doing with" is a commonly used term. However, there are various other synonyms that can be used in place of "doing with". These include engaging with, participating in, being involved with, working on, dealing with, handling, managing, directing, heading, operating and overseeing. Each synonym carries a slightly different nuance and can be chosen based on the specific context of the situation. By expanding one's vocabulary and choosing the appropriate synonym, the language can become more precise and effective in communicating one's message. It's always good to have an arsenal of synonyms to choose from.