pluton vs plutonic rock

pluton and plutonic rock both are nouns.

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

As nouns, pluton and plutonic rock are synonyms defined as:

pluton and plutonic rock: large mass of intrusive igneous rock believed to have solidified deep within the earth

Other synonyms of pluton include batholite, batholith.

pluton (noun)	plutonic rock (noun)
large mass of intrusive igneous rock believed to have solidified deep within the earth	large mass of intrusive igneous rock believed to have solidified deep within the earth