realist vs doer

realist and doer both are nouns.

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

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

realist: a person who accepts the world as it literally is and deals with it accordingly
doer: a person who acts and gets things done

Other hypernyms of realist include actor, worker.

realist (noun)	doer (noun)
a philosopher who believes that universals are real and exist independently of anyone thinking of them	a person who acts and gets things done
a painter who represents the world realistically and not in an idealized or romantic style
a person who accepts the world as it literally is and deals with it accordingly