Authentic rhymes with:
unauthentic, hentic, unauthentic, antic, atlantic, bankatlantic, frantic, gigantic, hentic, mcclintic, mcclintick, midlantic, orthodontic, pedantic, romantic, semantic, swantek, sycophantic, transatlantic, unauthentic, zientek
Authentic sounds like:
adenoids, admits, attendees, attends, attenuates, automates, automatic, automatics, automatix