Nicholas's rhymes with:
nautilus's, atlas's, dallas's, douglas's, douglass, nautilus's, necklaces, nicklaus's, surpluses, wireless's
Nicholas's sounds like:
naugles, necklace, necklaces, neoclassic, nicholas, nicholas', nicholes, nicholls, nichols, nichols', nichols's, nickel's, nickels, nicklas, nicklaus, nicklaus's, nickles, nickless, nickolas, nickols, nicolas, nicolaus, nicole's, nicolls, nicolosi, nicols, nikolaus, nikolic, nikolich, niziolek, nogales, nozzles, nuckles, nuckolls, nuckols, nucleic, nucleus