trier vs doer

trier and doer both are nouns.

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

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

Other hypernyms of trier include actor, worker.

trier (noun)	doer (noun)
one who tries	a person who acts and gets things done
one (as a judge) who examines and settles a case