unconscious vs nonconscious

unconscious is a noun but nonconscious is not a noun.

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

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

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