percipient vs doer

percipient and doer both are nouns.

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

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

percipient: a person who becomes aware (of things or events) through the senses
doer: a person who acts and gets things done

Other hypernyms of percipient include actor, worker.

percipient (noun)	doer (noun)
a person who becomes aware (of things or events) through the senses	a person who acts and gets things done

percipient (adjective)	doer (adjective)
characterized by ease and quickness in perceiving