activity vs inactivity

activity and inactivity both are nouns.

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

activity (noun)	inactivity (noun)
any specific behavior	being inactive; being less active
the trait of being active; moving or acting rapidly and energetically	a disposition to remain inactive or inert
an organic process that takes place in the body	the state of being inactive
a process existing in or produced by nature (rather than by the intent of human beings)
the state of being active
(chemistry) the capacity of a substance to take part in a chemical reaction