deactivation vs sacking

deactivation and sacking both are nouns.

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

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

deactivation: breaking up a military unit (by transfers or discharges)
sacking: the termination of someone's employment (leaving them free to depart)

Other hypernyms of deactivation include discharge, dismissal, dismission, firing, liberation, release, sack.

deactivation (noun)	sacking (noun)
the act of deactivating or making ineffective (as a bomb)	the termination of someone's employment (leaving them free to depart)
breaking up a military unit (by transfers or discharges)	coarse fabric used for bags or sacks