exhibitionist vs swellhead

exhibitionist and swellhead both are nouns.

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

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

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

Other hypernyms of exhibitionist include egoist, egotist.

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