noun (n)

• a discharge of lightning accompanied by thunder(noun.phenomenon)

  Synonym:
  bolt, bolt of lightning
  

  source: wordnet30
• a shocking surprise(noun.event)

  Synonym:
  bombshell, thunderclap
  

  source: wordnet30
• A shaft of lightning; a brilliant stream of electricity passing from one part of the heavens to another, or from the clouds to the earth.(noun)

  source: webster1913