noun (n)

• the rapid and continuous delivery of linguistic communication (spoken or written)(noun.communication)

  Example:
  A bombardment of mail complaining about his mistake.
  

  Synonym:
  barrage, onslaught, outpouring
  

  source: wordnet30
• the heavy fire of artillery to saturate an area rather than hit a specific target(noun.act)

  Synonym:
  barrage, barrage fire, battery, shelling
  

  source: wordnet30
• the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays)(noun.act)

  source: wordnet30
• an attack by dropping bombs(noun.act)

  Synonym:
  bombing
  

  source: wordnet30
• An attack upon a fortress or fortified town, with shells, hot shot, rockets, etc.; the act of throwing bombs and shot into a town or fortified place.(noun)

  source: webster1913