adjudicator vs doer

adjudicator and doer both are nouns.

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

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

Other hypernyms of adjudicator include actor, worker.

adjudicator (noun)	doer (noun)
a person who studies and settles conflicts and disputes	a person who acts and gets things done