Cantwell rhymes with:
boutwell, brightwell, chartwell, crotwell, fretwell, hartwell, otwell, sartwell, shotwell, whitwell
Cantwell sounds like:
candela, candella, candidly, candle, cannondale, cantel, cantle, cantley, centel, centola, chandley, chantal, chantilly, committal, condello, contel, coykendall, cundall, cundill