delayer vs doer

delayer and doer both are nouns.

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

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

Other hypernyms of delayer include actor, worker.

delayer (noun)	doer (noun)
a person who delays; to put off until later or cause to be late	a person who acts and gets things done