memorizer vs assimilator

memorizer and assimilator both are nouns.

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

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

memorizer: a person who learns by rote
assimilator: someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs

Other hypernyms of memorizer include learner, scholar, student.

memorizer (noun)	assimilator (noun)
a person who learns by rote	someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs