deviser vs doer

deviser and doer both are nouns.

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

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

Other hypernyms of deviser include actor, worker.

deviser (noun)	doer (noun)
a person who makes plans	a person who acts and gets things done