fragmentize vs grate

fragmentize is not a noun while grate is a noun.

Word	Noun	Adjective	Verb	Adverb
fragmentize	No	No	Yes	No
grate	Yes	No	Yes	No

As verbs, grate is a hyponym of fragmentize; that is, grate is a word with a more specific, narrower meaning than fragmentize:

Other hyponyms of fragmentize include atomise, atomize, bray, comminute, crunch, grind, mash, pound, sunder, sliver, splinter, rag, crumb, brecciate, crush, grind.

fragmentize (noun)	grate (noun)
	a frame of iron bars to hold a fire
	a barrier that has parallel or crossed bars blocking a passage but admitting air
	a harsh rasping sound made by scraping something

fragmentize (verb)	grate (verb)
break or cause to break into pieces	make a grating or grinding sound by rubbing together
	scratch repeatedly
	reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface
	gnaw into; make resentful or angry
	furnish with a grate