purebred vs brute

purebred and brute both are nouns.

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

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

Other hypernyms of purebred include animal, animate being, beast, creature, fauna.

purebred (noun)	brute (noun)
a pedigreed animal of unmixed lineage; used especially of horses	a living organism characterized by voluntary movement
	a cruelly rapacious person

purebred (adjective)	brute (adjective)
bred for many generations from member of a recognized breed or strain	resembling a beast; showing lack of human sensibility