polyglot vs doer

polyglot and doer both are nouns.

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

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

Other hypernyms of polyglot include actor, worker.

polyglot (noun)	doer (noun)
a person who speaks more than one language	a person who acts and gets things done

polyglot (adjective)	doer (adjective)
having a command of or composed in many languages