stoppage vs inactivity

stoppage and inactivity both are nouns.

Word	Noun	Adjective	Verb	Adverb
stoppage	Yes	No	No	No
inactivity	Yes	No	No	No

As nouns, inactivity is a hypernym of stoppage; that is, inactivity is a word with a broader meaning than stoppage:

Other hypernyms of stoppage include inaction, inactiveness.

stoppage (noun)	inactivity (noun)
the act of stopping something	being inactive; being less active
an obstruction in a pipe or tube	a disposition to remain inactive or inert
the state of inactivity following an interruption	the state of being inactive