psyche vs cognition

psyche and cognition both are nouns.

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

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

psyche: that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason
cognition: the psychological result of perception and learning and reasoning

Other hypernyms of psyche include knowledge, noesis.

psyche (noun)	cognition (noun)
that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason	the psychological result of perception and learning and reasoning
the immaterial part of a person; the actuating cause of an individual life