miracle worker vs doer

miracle worker and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
miracle worker	Yes	No	No	No
doer	Yes	No	No	No

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

Other hypernyms of miracle worker include actor, worker.

miracle worker (noun)	doer (noun)
a person who claims or is alleged to perform miracles	a person who acts and gets things done