noun (n)

• the act of firing weapons or artillery at an enemy(noun.act)

  Synonym:
  fire
  

  source: wordnet30
• the act of discharging a gun(noun.act)

  Synonym:
  discharge, firing off
  

  source: wordnet30
• the act of setting something on fire(noun.act)

  Synonym:
  ignition, inflammation, kindling, lighting
  

  source: wordnet30
• the termination of someone's employment (leaving them free to depart)(noun.act)

  Synonym:
  discharge, dismissal, dismission, liberation, release, sack, sacking
  

  source: wordnet30
• The act of discharging firearms.(noun)

  source: webster1913