nous vs ego

nous and ego both are nouns.

Word	Noun	Adjective	Verb	Adverb
nous	Yes	No	No	No
ego	Yes	No	No	No

As nouns, ego is a hyponym of nous; that is, ego is a word with a more specific, narrower meaning than nous:

nous: that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason
ego: (psychoanalysis) the conscious mind

nous (noun)	ego (noun)
that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason	(psychoanalysis) the conscious mind
common sense	your consciousness of your own identity
	an inflated feeling of pride in your superiority to others