impotency vs sexual practice

impotency and sexual practice both are nouns.

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

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