"Starts something" can be replaced with a number of different words that share a similar meaning. One option could be "launches," which suggests a deliberate and intentional beginning of something. Another synonym could be "commences," which implies a more formal and structured start to a process or event. "Initiates" is a more active and assertive word that conveys a sense of taking the first step or setting something in motion. "Begins" is a more straightforward option that is widely used and can be applied to a wide variety of situations. Ultimately, the best synonym for "starts something" will depend on the context and tone of the message being conveyed.