conscious vs consciousness

conscious is not a noun while consciousness is a noun.

Word	Noun	Adjective	Verb	Adverb
conscious	No	Yes	No	No
consciousness	Yes	No	No	No

conscious (noun)	consciousness (noun)
	an alert cognitive state in which you are aware of yourself and your situation
	having knowledge of

conscious (adjective)	consciousness (adjective)
knowing and perceiving; having awareness of surroundings and sensations and thoughts
(followed by `of') showing realization or recognition of something
intentionally conceived