brute vs brutal

brute is a noun but brutal is not a noun.

Word	Noun	Adjective	Verb	Adverb
brute	Yes	Yes	No	No
brutal	No	Yes	No	No

As adjectives, brute and brutal are synonyms defined as:

Other synonyms of brute include beastly, bestial, brutish.

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

brute (adjective)	brutal (adjective)
resembling a beast; showing lack of human sensibility	disagreeably direct and precise
	resembling a beast; showing lack of human sensibility
	punishingly harsh
	(of persons or their actions) able or disposed to inflict pain or suffering