firing
noun.
the act of firing weapons or artillery at an enemy
hold your fire until you can see the whites of their eyes|they retreated in the face of withering enemy fire
Synonym: fire
noun.
the act of discharging a gun
Synonym: discharge, firing off
noun.
the act of setting something on fire
Synonym: ignition, inflammation, kindling, lighting
noun.
the termination of someone's employment (leaving them free to depart)
Synonym: sacking, sack, release, liberation, dismission, dismissal, discharge