Main entry: unmatchable, unmatched, matchless, unrivaled, unrivalled, one, one and only, nonpareil, peerless
Definition: eminent beyond or above comparison
Usage: matchless beauty; the team's nonpareil center fielder; she's one girl in a million; the one and only Muhammad Ali; a peerless scholar; infamy unmatched in the Western world; wrote with unmatchable clarity; unrivaled mastery of her art