champion vs virtuoso

champion and virtuoso both are nouns.

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

As nouns, champion and virtuoso are synonyms defined as:

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

champion (noun)	virtuoso (noun)
someone who fights for a cause	someone who is dazzlingly skilled in any field
someone who has won first place in a competition	a musician who is a consummate master of technique and artistry
a person who backs a politician or a team etc.
someone who is dazzlingly skilled in any field

champion (adjective)	virtuoso (adjective)
holding first place in a contest	having or revealing supreme mastery or skill

champion (verb)	virtuoso (verb)
protect or fight for as a champion