KO'd vs unconscious

KO'd is not a noun while unconscious is a noun.

Word	Noun	Adjective	Verb	Adverb
KO'd	No	Yes	No	No
unconscious	Yes	Yes	No	No

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

KO'd (adjective)	unconscious (adjective)
knocked unconscious by a heavy blow	not conscious; lacking awareness and the capacity for sensory perception as if asleep or dead
	without conscious volition
	(followed by `of') not knowing or perceiving