intellect vs doer

intellect and doer both are nouns.

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

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

Other hypernyms of intellect include actor, worker.

intellect (noun)	doer (noun)
the capacity for rational thought or inference or discrimination	a person who acts and gets things done
knowledge and intellectual ability
a person who uses the mind creatively