The term "lit firecracker" can be replaced with a number of different synonyms depending on the context. Some possible options might include "sparkling explosive," "flaming charge," "ignited pyrotechnic," or simply "lit explosive." Other possibilities might include "whistling bomb," "banging firework," or "crackling rocket." Ultimately, the most appropriate synonym will depend on the specific situation and the desired effect. Whether you're writing a novel, a movie script, or a news article, it's important to choose the right language to convey the excitement, danger, and spectacle of a lit firecracker or any other kind of explosive device.