genius vs superstar

genius and superstar both are nouns.

Word	Noun	Adjective	Verb	Adverb
genius	Yes	No	No	No
superstar	Yes	No	No	No

As nouns, genius and superstar are synonyms defined as:

Other synonyms of genius include ace, adept, champion, hotshot, maven, mavin, sensation, star, virtuoso, whiz, whizz, wiz, wizard.

genius (noun)	superstar (noun)
exceptional creative ability	someone who is dazzlingly skilled in any field
a natural talent
unusual mental ability
someone who has exceptional intellectual ability and originality
someone who is dazzlingly skilled in any field