allayer vs doer

allayer and doer both are nouns.

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

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

allayer: a person who reduces the intensity (e.g., of fears) and calms and pacifies
doer: a person who acts and gets things done

Other hypernyms of allayer include actor, worker.

allayer (noun)	doer (noun)
a person who reduces the intensity (e.g., of fears) and calms and pacifies	a person who acts and gets things done