unregistered vs animal

unregistered is not a noun while animal is a noun.

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

unregistered (noun)	animal (noun)
	a living organism characterized by voluntary movement

unregistered (adjective)	animal (adjective)
not registered	marked by the appetites and passions of the body
(of animals) not recorded with or certified by an official breed association
(a boat or vessel) not furnished with official documents