nerd vs assimilator

nerd and assimilator both are nouns.

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

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

nerd: an insignificant student who is ridiculed as being affected or boringly studious
assimilator: someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs

Other hypernyms of nerd include learner, scholar, student.

nerd (noun)	assimilator (noun)
an insignificant student who is ridiculed as being affected or boringly studious	someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs
an intelligent but single-minded expert in a particular technical field or profession