Dictionary 1. (a.) Producing thunder.2. (a.) Making a noise like thunder; sounding loud and deep; sonorous. Thesaurus booming cannonading deafening ear-piercing ear-rending ear-splitting earthshaking forte fortissimo full fulminating loud loud-sounding loudish noisy pealing piercing plangent resounding ringing roaring rolling rumbling sonorous stentoraphonic stentorian stentorious thundering thunderlike thundery tonitruant tonitruous tumultuous volleying window-rattling |