Which word is characterized by a noisy uproar?

The term "tumultuous" is derived from "tumult," which refers to a loud, confused noise, especially one caused by a large mass of people. This word is often used to describe situations marked by chaos, uproar, or disorder. It captures the essence of an environment filled with commotion, highlighting the noisy and turbulent elements characteristic of that scenario.

In contrast, the other options convey entirely different meanings. "Tranquil" refers to a state of peace and calm, while "serene" suggests a clear and calm demeanor. "Solitary" indicates being alone or isolated, which does not align with the idea of noise or uproar. The distinguishing definition of "tumultuous" makes it the best choice to characterize a noisy uproar.