Main entry: ace, adept, superstar, champion, sensation, star, genius, whiz, whizz, virtuoso, wiz, wizard, maven, mavin, hotshot
Definition: someone who is dazzlingly skilled in any field
Main entry: champion, fighter, hero, paladin
Definition: someone who fights for a cause
Main entry: champ, champion, title-holder
Definition: someone who has won first place in a competition
Main entry: supporter, friend, admirer, protagonist, booster, champion
Definition: a person who backs a politician or a team etc.
Usage: all their supporters came out for the game; they are friends of the library
Definition: protect or fight for as a champion
Main entry: champion, prizewinning
Definition: holding first place in a contest
Usage: a champion show dog; a prizewinning wine