exhibitionist vs egoist

exhibitionist and egoist both are nouns.

Word	Noun	Adjective	Verb	Adverb
exhibitionist	Yes	No	No	No
egoist	Yes	No	No	No

As nouns, egoist is a hypernym of exhibitionist; that is, egoist is a word with a broader meaning than exhibitionist:

exhibitionist: someone who deliberately behaves in such a way as to attract attention
egoist: a conceited and self-centered person

Other hypernyms of exhibitionist include egotist, swellhead.

exhibitionist (noun)	egoist (noun)
someone who deliberately behaves in such a way as to attract attention	a self-centered person with little regard for others
someone with a compulsive desire to expose the genitals	a conceited and self-centered person