sexual activity vs prophylactic

sexual activity and prophylactic both are nouns.

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

sexual activity (noun)	prophylactic (noun)
activities associated with sexual intercourse	contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
	remedy that prevents or slows the course of an illness or disease

sexual activity (adjective)	prophylactic (adjective)
	preventing or contributing to the prevention of disease
	warding off
	capable of preventing conception or impregnation