bluecoat vs doer

bluecoat and doer both are nouns.

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

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

Other hypernyms of bluecoat include actor, worker.

bluecoat (noun)	doer (noun)
a person dressed all in blue (as a soldier or sailor)	a person who acts and gets things done