sexual activity vs desire

sexual activity and desire both are nouns.

Word	Noun	Adjective	Verb	Adverb
sexual activity	Yes	No	No	No
desire	Yes	No	Yes	No

sexual activity (noun)	desire (noun)
activities associated with sexual intercourse	an inclination to want things
	the feeling that accompanies an unsatisfied state
	something that is desired

sexual activity (verb)	desire (verb)
	feel or have a desire for; want strongly
	express a desire for
	expect and wish