The phrase "raise rumpus" is an informal expression that means to cause a disturbance or make a commotion. If you're looking for synonyms that convey a similar meaning, there are a few options to choose from. For instance, you could use the phrase "stir up trouble" or "make a fuss". Another alternative is to say someone is "causing chaos" or "creating a scene". If you want to use a more dramatic term, you might say someone is "wreaking havoc" or "disrupting the peace". Regardless of which phrase you use, each of these synonyms convey the idea that someone is causing a disturbance or creating a noisy commotion.