Most sonic refers to a sound that is the loudest or most powerful. Some synonyms for most sonic include thunderous, deafening, ear-splitting, and booming. Thunderous refers to a sound that resembles thunder, while deafening indicates a sound so loud that it can cause temporary hearing loss. Ear-splitting conveys the idea of a sound so intense that it feels like it is tearing your ears apart, while booming describes a sound that is deep and resonant, like an explosion. These words are often used to describe music, particularly live performances, or natural phenomena such as thunderstorms or earthquakes.