eccentric vs doer

eccentric and doer both are nouns.

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

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

Other hypernyms of eccentric include actor, worker.

eccentric (noun)	doer (noun)
a person with an unusual or odd personality	a person who acts and gets things done
a person of a specified kind (usually with many eccentricities)

eccentric (adjective)	doer (adjective)
not having a common center; not concentric
conspicuously or grossly unconventional or unusual