yawner vs doer

yawner and doer both are nouns.

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

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

Other hypernyms of yawner include actor, worker.

yawner (noun)	doer (noun)
a person who yawns	a person who acts and gets things done