cognizance vs perception

cognizance and perception both are nouns.

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

As nouns, perception is a hypernym of cognizance; that is, perception is a word with a broader meaning than cognizance:

cognizance (noun)	perception (noun)
having knowledge of	becoming aware of something via the senses
range of what one can know or understand	the process of perceiving
range or scope of what is perceived	the representation of what is perceived; basic component in the formation of a concept
	a way of conceiving something
	knowledge gained by perceiving