nurser vs doer

nurser and doer both are nouns.

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

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

Other hypernyms of nurser include actor, worker.

nurser (noun)	doer (noun)
a person who treats something carefully	a person who acts and gets things done