granite vs plutonic rock

granite and plutonic rock both are nouns.

Word	Noun	Adjective	Verb	Adverb
granite	Yes	No	No	No
plutonic rock	Yes	No	No	No

As nouns, plutonic rock is a hypernym of granite; that is, plutonic rock is a word with a broader meaning than granite:

granite: plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz
plutonic rock: large mass of intrusive igneous rock believed to have solidified deep within the earth

Other hypernyms of granite include batholite, batholith, pluton.

granite (noun)	plutonic rock (noun)
something having the quality of granite (unyielding firmness)	large mass of intrusive igneous rock believed to have solidified deep within the earth
plutonic igneous rock having visibly crystalline texture; generally composed of feldspar and mica and quartz