inactivation vs natural action

inactivation and natural action both are nouns.

Word	Noun	Adjective	Verb	Adverb
inactivation	Yes	No	No	No
natural action	Yes	No	No	No

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

inactivation: the process of rendering inactive
natural action: a process existing in or produced by nature (rather than by the intent of human beings)

Other hypernyms of inactivation include action, activity, natural process.

inactivation (noun)	natural action (noun)
breaking up a military unit (by transfers or discharges)	a process existing in or produced by nature (rather than by the intent of human beings)
the process of rendering inactive