brute vs fully grown

brute is a noun but fully grown is not a noun.

Word	Noun	Adjective	Verb	Adverb
brute	Yes	Yes	No	No
fully grown	No	Yes	No	No

brute (noun)	fully grown (noun)
a living organism characterized by voluntary movement
a cruelly rapacious person

brute (adjective)	fully grown (adjective)
resembling a beast; showing lack of human sensibility	(of animals) fully developed