There are many synonyms for the phrase "be noisy". These include words like "clamorous", "raucous", "rowdy", "boisterous", "loud", and "uproarious". Each of these words conveys a slightly different meaning, but all generally describe a situation or person that is making a lot of noise. Whether describing a loud party, a raucous concert, or a rowdy child, these synonyms for "be noisy" can help to add variety and depth to your writing. By using these words, you can better capture the atmosphere and mood of a scene, and make your writing more engaging and vivid.