nonconscious vs unconscious

nonconscious is not a noun while unconscious is a noun.

Word	Noun	Adjective	Verb	Adverb
nonconscious	No	Yes	No	No
unconscious	Yes	Yes	No	No

nonconscious (noun)	unconscious (noun)
	that part of the mind wherein psychic activity takes place of which the person is unaware

nonconscious (adjective)	unconscious (adjective)
relating to the lack of consciousness of inanimate things	not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
concerning mental functioning that is not represented in consciousness	without conscious volition
	(followed by `of') not knowing or perceiving