brute vs attacker

brute and attacker both are nouns.

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

As nouns, attacker is a hypernym of brute; that is, attacker is a word with a broader meaning than brute:

Other hypernyms of brute include aggressor, assailant, assaulter.

brute (noun)	attacker (noun)
a living organism characterized by voluntary movement	someone who attacks
a cruelly rapacious person

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