awareness vs cognisance

awareness and cognisance both are nouns.

Word	Noun	Adjective	Verb	Adverb
awareness	Yes	No	No	No
cognisance	Yes	No	No	No

As nouns, awareness and cognisance are synonyms defined as:

Other synonyms of awareness include cognizance, consciousness, knowingness.

awareness (noun)	cognisance (noun)
having knowledge of	having knowledge of
state of elementary or undifferentiated consciousness