superstar vs virtuoso

superstar and virtuoso both are nouns.

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

As nouns, superstar and virtuoso are synonyms defined as:

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

superstar (noun)	virtuoso (noun)
someone who is dazzlingly skilled in any field	someone who is dazzlingly skilled in any field
	a musician who is a consummate master of technique and artistry

superstar (adjective)	virtuoso (adjective)
	having or revealing supreme mastery or skill