cognizance vs cognisant

cognizance is a noun but cognisant is not a noun.

Word	Noun	Adjective	Verb	Adverb
cognizance	Yes	No	No	No
cognisant	No	Yes	No	No

cognizance (noun)	cognisant (noun)
having knowledge of
range of what one can know or understand
range or scope of what is perceived

cognizance (adjective)	cognisant (adjective)
	(sometimes followed by `of') having or showing knowledge or understanding or realization or perception