grandstander vs exhibitionist

grandstander and exhibitionist both are nouns.

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

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

grandstander: someone who performs with an eye to the applause from spectators in the grandstand
exhibitionist: someone who deliberately behaves in such a way as to attract attention

Other hypernyms of grandstander include show-off.

grandstander (noun)	exhibitionist (noun)
someone who performs with an eye to the applause from spectators in the grandstand	someone who deliberately behaves in such a way as to attract attention
	someone with a compulsive desire to expose the genitals