Authentic
Part of speech: adjective
Definition: Of the same origin as claimed; genuine. Conforming to reality and therefore worthy of trust, reliance, or belief. Having authority.
Original
Part of speech: adjective
Definition: First in a series or copies/versionsNewly createdFresh, differentPioneeringHaving as its origin
Part of speech: noun
Definition: An object or other creation (e.g. narrative work) from which all later copies and variations are derivedA person with a unique and interesting personality and/or creative talentAn eccentric