sexual activity vs rouse

sexual activity is a noun but rouse is not a noun.

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

sexual activity (noun)	rouse (noun)
activities associated with sexual intercourse

sexual activity (verb)	rouse (verb)
	cause to become awake or conscious
	cause to be agitated, excited, or roused
	force or drive out
	become active