perception vs cognition

perception and cognition both are nouns.

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

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

perception: knowledge gained by perceiving
cognition: the psychological result of perception and learning and reasoning

Other hypernyms of perception include knowledge, noesis.

perception (noun)	cognition (noun)
becoming aware of something via the senses	the psychological result of perception and learning and reasoning
the process of perceiving
the representation of what is perceived; basic component in the formation of a concept
a way of conceiving something
knowledge gained by perceiving