involuntary vs unconscious

involuntary is not a noun while unconscious is a noun.

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

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

involuntary (adjective)	unconscious (adjective)
not subject to the control of the will	not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
controlled by the autonomic nervous system; without conscious control	without conscious volition
	(followed by `of') not knowing or perceiving