unregistered vs brute

unregistered is not a noun while brute is a noun.

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

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

unregistered (adjective)	brute (adjective)
not registered	resembling a beast; showing lack of human sensibility
(of animals) not recorded with or certified by an official breed association
(a boat or vessel) not furnished with official documents