The term "runs on" typically refers to something that is powered by a specific source or operating system. There are many synonyms for this phrase, depending on the context in which it's used. For example, "operates on," "functions with," and "relies on" are all synonyms for "runs on." In the technology industry, "powered by" or "runs off of" are often used as well. In a medical context, "dependent on" or "sustained by" could be appropriate synonyms. Ultimately, the specific synonym used will depend on the context and intended meaning of the phrase "runs on".