grind vs break up

grind is a noun but break up is not a noun.

Word	Noun	Adjective	Verb	Adverb
grind	Yes	No	Yes	No
break up	No	No	Yes	No

As verbs, break up is a hypernym of grind; that is, break up is a word with a broader meaning than grind:

Other hypernyms of grind include fragment, fragmentise, fragmentize.

As verbs, break up is a hypernym of grind; that is, break up is a word with a broader meaning than grind:

Other hypernyms of grind include fragment, fragmentise, fragmentize.

grind (noun)	break up (noun)
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

grind (verb)	break up (verb)
reduce to small pieces or particles by pounding or abrading	laugh unrestrainedly
make a grating or grinding sound by rubbing together	break or cause to break into pieces
press or grind with a crushing noise	come to an end
shape or form by grinding	separate (substances) into constituent elements or parts
created by grinding	cause to go into a solution
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	cause to separate
work hard	close at the end of a session
	bring the association of to an end or cause to break up
	make a break in
	set or keep apart
	break violently or noisily; smash
	attack with or as if with a pickaxe of ice or rocky ground, for example
	release ice
	destroy the completeness of a set of related items
	take apart into its constituent pieces
	suffer a nervous breakdown
	disband
	to cause to separate and go in different directions
	discontinue an association or relation; go different ways