sacking vs ending

sacking and ending both are nouns.

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

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

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

Other hypernyms of sacking include conclusion, termination.

sacking (noun)	ending (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)
	the last section of a communication
	event whose occurrence ends something
	the point in time at which something ends