sacking vs firing

sacking and firing both are nouns.

Word	Noun	Adjective	Verb	Adverb
sacking	Yes	No	No	No
firing	Yes	No	No	No

As nouns, sacking and firing are synonyms defined as:

sacking and firing: the termination of someone's employment (leaving them free to depart)

Other synonyms of sacking include discharge, dismissal, dismission, liberation, release, sack.

sacking (noun)	firing (noun)
the termination of someone's employment (leaving them free to depart)	the act of setting something on fire
coarse fabric used for bags or sacks	the termination of someone's employment (leaving them free to depart)
	the act of discharging a gun
	the act of firing weapons or artillery at an enemy