DUPER Synonyms: 55 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/duper
WebSynonyms for DUPER: dissembler, counterfeiter, trickster, misleader, deceiver, actor, bluffer, copycat; Antonyms of DUPER: professional, master, expert, whiz, ace, virtuoso, adept, authority.
DA: 58 PA: 15 MOZ Rank: 87