inactivation vs dismission

inactivation and dismission both are nouns.

Word	Noun	Adjective	Verb	Adverb
inactivation	Yes	No	No	No
dismission	Yes	No	No	No

As nouns, dismission is a hypernym of inactivation; that is, dismission is a word with a broader meaning than inactivation:

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

Other hypernyms of inactivation include discharge, dismissal, firing, liberation, release, sack, sacking.

inactivation (noun)	dismission (noun)
breaking up a military unit (by transfers or discharges)	the termination of someone's employment (leaving them free to depart)
the process of rendering inactive	official notice that you have been fired from your job