grate vs masticate

grate is a noun but masticate is not a noun.

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

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

Other hyponyms of grate include gnash, chew, jaw, manducate.

grate (noun)	masticate (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

grate (verb)	masticate (verb)
make a grating or grinding sound by rubbing together	chew (food); to bite and grind with the teeth
scratch repeatedly	grind and knead
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