pause vs inactivity

pause and inactivity both are nouns.

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

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

pause (noun)	inactivity (noun)
temporary inactivity	being inactive; being less active
a time interval during which there is a temporary cessation of something	a disposition to remain inactive or inert
	the state of being inactive

pause (verb)	inactivity (verb)
cease an action temporarily
interrupt temporarily an activity before continuing