Magnitudes rhymes with:
aptitudes, attitudes, latitudes, longitudes, altitudes, aptitudes, attitudes, etudes, latitudes, longitudes, platitudes
Magnitudes sounds like:
macintax, macintosh, macintosh's, macintoshes, mackintosh, magnates, magnet's, magnetek, magnetic, magnetics, magnets, management's, managements, managements', mankind's, mankinds, massenet's, mccants, mcintosh, mismatch, mismatches, monsanto's