sexual activity vs impotency

sexual activity and impotency both are nouns.

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

sexual activity (noun)	impotency (noun)
activities associated with sexual intercourse	the quality of lacking strength or power; being weak and feeble
	an inability (usually of the male animal) to copulate