The Oxford Thesaurus An A-Z Dictionary of Synonyms - erupt v.

1) eject, discharge, expel, emit, burst forth or out, blow up, explode, spew forth or out, break out, spout, vomit (up or forth) , throw up or off, spit out or up, belch (forth) , gush: The volcano erupted ash and lava. 2) appear, come out, break out: A boil erupted on his chin.