sneezer vs doer

sneezer and doer both are nouns.

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

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

Other hypernyms of sneezer include actor, worker.

sneezer (noun)	doer (noun)
a person who sneezes	a person who acts and gets things done