noun (n)

• the sudden occurrence of a violent discharge of steam and volcanic material(noun.event)

  Synonym:
  volcanic eruption
  

  source: wordnet30
• symptom consisting of a breaking out and becoming visible(noun.state)

  source: wordnet30
• (of volcanos) pouring out fumes or lava (or a deposit so formed)(noun.state)

  Synonym:
  eructation, extravasation
  

  source: wordnet30
• a sudden violent spontaneous occurrence (usually of some undesirable condition)(noun.event)

  Synonym:
  irruption, outbreak
  

  source: wordnet30
• a sudden very loud noise(noun.event)

  Synonym:
  bam, bang, blast, clap
  

  source: wordnet30
• the emergence of a tooth as it breaks through the gum(noun.event)

  source: wordnet30
• The act of breaking out or bursting forth; as: (a) A violent throwing out of flames, lava, etc., as from a volcano of a fissure in the earth's crust. (b) A sudden and overwhelming hostile movement of armed men from one country to another. Milton. (c) A violent commotion.(noun)

  source: webster1913