outbreak

Synonyms: beginning blowup brawl break breaking burst bursting commencement commotion convulsion crack crash dawn detonation discharge disorder disruption ebullition effervescence epidemic eruption explosion fit flare-up flash fury gush gushing insurrection irruption mutiny onset outburst outpouring paroxysm plague rebellion rending revolution roar sally sortie spasm spurt storm sundering surge thunder tumult uprising volley

Antonyms: conclusion end finale