1. Eminent beyond or above comparison
   "unrivalled mastery of her art"
   - matchless, nonpareil, one, one and only, peerless, unmatched, unmatchable, unrivaled [US]

See also: incomparable, uncomparable

• sustainable
• sustained
• sustained yield
• sustainer
• sustaining pedal
• sustaining program
• sustainment
• sustenance
• sustentacular
• sustentation
• sustentative
• susurrant
• susurrate
• susurration
• susurrous
• susurrus
• Sutherland
• sutler
• sutra
• suttee
• sutura
• sutura coronalis
• sutura frontalis
• sutura intermaxillaris
• sutura internasalis