authentic

[ɔːˈθɛntɪk]

ADJECTIVE

of undisputed origin and not a copy; genuine.
“the letter is now accepted as an authentic document”
synonyms: genuine • original • real • actual • pukka • bona fide • true • veritable • [more]

wow

[waʊ]

NOUN

a sensational success. “your play’s a wow”
synonyms: success • box-office success • sell-out • winner • triumph • sensation • [more]

EXCLAMATION: expressing astonishment or admiration. “‘Wow!’ he cried enthusiastically”