blogger vs doer

blogger and doer both are nouns.

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

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

Other hypernyms of blogger include actor, worker.

blogger (noun)	doer (noun)
a person who keeps and updates a blog	a person who acts and gets things done