Synonyms for outbreak

noun

1. A sudden violent appearance

   eruption, irruption, ebullition, explosion, outburst, disruption, burst, bursting, bursting forth, detonation, thunder, commotion, rending, break, breaking out, breaking forth, gush, gushing forth, outpouring, pouring forth, breaking bonds, tumult, spurt, sundering, snapping apart, discharge, volley, blast, blowup, crash, roar, earthquake, temblor, squall, paroxysm, spasm, convulsion, fit, ictus, effervescence, boiling, flash, flare, crack.

   Antonyms peace*, tranquility, quiet.

2. Sudden violence

   fury, mutiny, brawl; see disorder 2, revolution 2.