impuissance vs weakness

impuissance and weakness both are nouns.

Word	Noun	Adjective	Verb	Adverb
impuissance	Yes	No	No	No
weakness	Yes	No	No	No

As nouns, impuissance and weakness are synonyms defined as:

Other synonyms of impuissance include helplessness.

impuissance (noun)	weakness (noun)
powerlessness revealed by an inability to act	the property of lacking physical or mental strength; liability to failure under pressure or stress or strain
	powerlessness revealed by an inability to act
	a penchant for something even though it might not be good for you
	a flaw or weak point
	the condition of being financially weak