egotistic vs egotism

egotistic is not a noun while egotism is a noun.

Word	Noun	Adjective	Verb	Adverb
egotistic	No	Yes	No	No
egotism	Yes	No	No	No

egotistic (noun)	egotism (noun)
	an exaggerated opinion of your own importance
	an inflated feeling of pride in your superiority to others

egotistic (adjective)	egotism (adjective)
characteristic of false pride; having an exaggerated sense of self-importance
characteristic of those having an inflated idea of their own importance