Atlantis's rhymes with:
justice's, justices', aldus's, allegis's, angeles's, annapolis's, auspices, beatrice's, bodices, boris's, burriss, business's, candice's, dukakis's, dukakises, ellis's, elvis's, ferriss, harris's, harrises, indianapolis's, jarvis's, justice's, justices', lewis's, louis's, matrices, minneapolis's, morris's, morriss, paris's, penises, prejudices, service's, services', telesis's, venice's, willis's
Atlantis's sounds like:
atlanta's, atlantic, atlantic's, atlantica, atlantico, atlantis, atlantis'