unattached vs brute

unattached is not a noun while brute is a noun.

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

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

unattached (adjective)	brute (adjective)
not associated in an exclusive sexual relationship	resembling a beast; showing lack of human sensibility
not fastened together
(of animals) able to swim about; not attached