assimilator vs doer

assimilator and doer both are nouns.

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

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

assimilator: someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
doer: a person who acts and gets things done

Other hypernyms of assimilator include actor, worker.

assimilator (noun)	doer (noun)
someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs	a person who acts and gets things done