Nicholas' rhymes with:
nicholas, nicolas, nicholas, nicolas, aeschelus, nicholas, nicolas, oscalus, acropolis, aeschelus, anomalous, boulalas, calculus, carolus, credulous, daedalus, deangelis, fabulous, frivolous, garrulous, heliopolis, hydroencephalus, incredulous, libelous, los-angeles, maquilas, marvelous, mcnicholas, megalopolis, merciless, meticulous, metropolis, miraculous, nautilus, nebulous, necropolis, nicholas, nicolas, oscalus, oxalis, papadopoulos, pendulous, perilous, persepolis, populace, populous, querulous, ridiculous, romulus, scandalous, scrupulous, scurrilous, segalas, stefanopolis, stephanopoulos, stephanopoulos', stimulus, tantalus, tremulous, unscrupulous
Nicholas' sounds like:
naugles, necklace, necklaces, neoclassic, nicholas, nicholas's, 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