egotistic vs vain

egotistic and vain both are adjectives.

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

As adjectives, egotistic and vain are synonyms defined as:

egotistic and vain: characteristic of false pride; having an exaggerated sense of self-importance

Other synonyms of egotistic include conceited, egotistical, self-conceited, swollen-headed, swollen.

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