egotism vs egotistic

egotism is a noun but egotistic is not a noun.

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

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

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