baldy vs doer

baldy and doer both are nouns.

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

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

Other hypernyms of baldy include actor, worker.

baldy (noun)	doer (noun)
a person whose head is bald or shaved	a person who acts and gets things done