sexual activity vs gamy

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

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

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

sexual activity (adjective)	gamy (adjective)
	willing to face danger
	(used of the smell of meat) smelling spoiled or tainted
	suggestive of sexual impropriety