sweater vs doer

sweater and doer both are nouns.

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

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

Other hypernyms of sweater include actor, worker.

sweater (noun)	doer (noun)
a crocheted or knitted garment covering the upper part of the body	a person who acts and gets things done
a person who perspires