percher vs doer

percher and doer both are nouns.

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

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

Other hypernyms of percher include actor, worker.

percher (noun)	doer (noun)
a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists	a person who acts and gets things done
a person situated on a perch