Megalopolis rhymes with:
acropolis, heliopolis, metropolis, necropolis, papadopoulos, stephanopoulos, stephanopoulos', acropolis, heliopolis, metropolis, necropolis, papadopoulos, persepolis, stefanopolis, stephanopoulos, stephanopoulos'
acropolis, heliopolis, metropolis, necropolis, papadopoulos, stephanopoulos, stephanopoulos', acropolis, heliopolis, metropolis, necropolis, papadopoulos, persepolis, stefanopolis, stephanopoulos, stephanopoulos'