Sinfonia rhymes with:
diaphonia, adonia, amazonia, ansonia, antonia, caledonia, colonia, cydonia, diaphonia, donia, estonia, gastonia, gonia, harmonia, idonia, latonia, macedonia, madonia, new-caledonia, omonia, patagonia, petronia, philharmonia, rondonia, sidonia, slavonia, slovonia, sophronia, tonia, vernonia, vidonia
Sinfonia sounds like:
sampan, schoenbaum, shampine, shimbun, shinbein, shinbone, sniffen, sunbeam, symbion, symphony