consciousness vs ego

consciousness and ego both are nouns.

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

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

consciousness: an alert cognitive state in which you are aware of yourself and your situation
ego: your consciousness of your own identity

Other hyponyms of consciousness include stream of consciousness, self, awareness, sentience, aesthesia, esthesia, sensibility, waking.

consciousness (noun)	ego (noun)
an alert cognitive state in which you are aware of yourself and your situation	(psychoanalysis) the conscious mind
having knowledge of	your consciousness of your own identity
	an inflated feeling of pride in your superiority to others