baulker vs doer

baulker and doer both are nouns.

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

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

Other hypernyms of baulker include actor, worker.

baulker (noun)	doer (noun)
a person who refuses to comply	a person who acts and gets things done