Megalomaniac rhymes with:
maniac, nymphomaniac, maniac, nymphomaniac, eniac, insomniac, maniac, nymphomaniac, amnesiac, cardiac, eniac, insomniac, kodiak, maniac, nymphomaniac, pontiac, zodiac
Megalomaniac sounds like:
macklin's, macwilliams, magallanes, magellan's, magellanic, mangling, maslanka, mcclimans, mcclung, mcglinchey, mclean's, mcwilliams, mechling, miglin's, mingling, miscellaneous, monoclinic, moskolenko, moslems, muscling, muslims, mussolini's, myslinski