impuissant vs impotent

impuissant and impotent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
impuissant	No	Yes	No	No
impotent	No	Yes	No	No

impuissant (adjective)	impotent (adjective)
lacking physical strength or vigor	lacking power or ability
	(of a male) unable to copulate