sacking vs termination

sacking and termination both are nouns.

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

As nouns, termination is a hypernym of sacking; that is, termination is a word with a broader meaning than sacking:

sacking: the termination of someone's employment (leaving them free to depart)
termination: the act of ending something

Other hypernyms of sacking include conclusion, ending.

sacking (noun)	termination (noun)
the termination of someone's employment (leaving them free to depart)	the act of ending something
coarse fabric used for bags or sacks	the end of a word (a suffix or inflectional ending or final morpheme)
	something that results
	a place where something ends or is complete
	a coming to an end of a contract period