experimenter vs doer

experimenter and doer both are nouns.

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

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

Other hypernyms of experimenter include actor, worker.

experimenter (noun)	doer (noun)
a research worker who conducts experiments	a person who acts and gets things done
a person who enjoys testing innovative ideas