waker vs doer

waker and doer both are nouns.

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

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

Other hypernyms of waker include actor, worker.

waker (noun)	doer (noun)
a person who awakes	a person who acts and gets things done
someone who rouses others from sleep