unpersuasiveness vs impotency

unpersuasiveness and impotency both are nouns.

Word	Noun	Adjective	Verb	Adverb
unpersuasiveness	Yes	No	No	No
impotency	Yes	No	No	No

As nouns, impotency is a hypernym of unpersuasiveness; that is, impotency is a word with a broader meaning than unpersuasiveness:

Other hypernyms of unpersuasiveness include impotence, powerlessness.

unpersuasiveness (noun)	impotency (noun)
inability to persuade	the quality of lacking strength or power; being weak and feeble
	an inability (usually of the male animal) to copulate