rest vs inactivity

rest and inactivity both are nouns.

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

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

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

Other hypernyms of rest include inaction, inactiveness.

rest (noun)	inactivity (noun)
freedom from activity (work or strain or responsibility)	being inactive; being less active
a support on which things can be put	a disposition to remain inactive or inert
a musical notation indicating a silence of a specified duration	the state of being inactive
something left after other parts have been taken away
a state of inaction
euphemisms for death (based on an analogy between lying in a bed and in a tomb)
a pause for relaxation

rest (verb)	inactivity (verb)
be at rest
stay the same; remain in a certain state
take a short break from one's activities in order to relax
give a rest to
not move; be in a resting position
sit, as on a branch
rest on or as if on a pillow
put something in a resting position, as for support or steadying
be inactive, refrain from acting
have a place in relation to something else
be inherent or innate in