eristic vs doer

eristic and doer both are nouns.

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

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

Other hypernyms of eristic include actor, worker.

eristic (noun)	doer (noun)
the art of logical disputation (especially if specious)	a person who acts and gets things done
a person who disputes; who is good at or enjoys controversy

eristic (adjective)	doer (adjective)
given to disputation for its own sake and often employing specious arguments