brute vs brutish

brute is a noun but brutish is not a noun.

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

As adjectives, brute and brutish are synonyms defined as:

brute and brutish: resembling a beast; showing lack of human sensibility

Other synonyms of brute include beastly, bestial, brutal.

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

brute (adjective)	brutish (adjective)
resembling a beast; showing lack of human sensibility	resembling a beast; showing lack of human sensibility