powerhouse vs doer

powerhouse and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
powerhouse	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of powerhouse; that is, doer is a word with a broader meaning than powerhouse:

Other hypernyms of powerhouse include actor, worker.

powerhouse (noun)	doer (noun)
an electrical generating station	a person who acts and gets things done
a team considered to be the best of its class
a highly energetic and indefatigable person