helplessness vs impotence

helplessness and impotence both are nouns.

Word	Noun	Adjective	Verb	Adverb
helplessness	Yes	No	No	No
impotence	Yes	No	No	No

As nouns, impotence is a hypernym of helplessness; that is, impotence is a word with a broader meaning than helplessness:

Other hypernyms of helplessness include impotency, powerlessness.

helplessness (noun)	impotence (noun)
powerlessness revealed by an inability to act	the quality of lacking strength or power; being weak and feeble
a feeling of being unable to manage	an inability (usually of the male animal) to copulate
the state of needing help from something