sex activity vs rouse

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

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

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

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