assimilator vs grind

assimilator and grind both are nouns.

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

As nouns, grind is a hyponym of assimilator; that is, grind is a word with a more specific, narrower meaning than assimilator:

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

Other hyponyms of assimilator include memoriser, memorizer, quick study, sponge, dweeb, nerd, swot, wonk, tutee.

assimilator (noun)	grind (noun)
someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs	the act of grinding to a powder or dust
	hard monotonous routine work
	the grade of particle fineness to which a substance is ground
	an insignificant student who is ridiculed as being affected or boringly studious

assimilator (verb)	grind (verb)
	reduce to small pieces or particles by pounding or abrading
	make a grating or grinding sound by rubbing together
	press or grind with a crushing noise
	shape or form by grinding
	created by grinding
	dance by rotating the pelvis in an erotically suggestive way, often while in contact with one's partner such that the dancers' legs are interlaced
	work hard