Silvadio rhymes with:
addeo, amadeo, bonadio, donadio, taddeo, addeo, amadeo, bonadio, cadieux, cardio, custodio, daddy-o, degidio, delgaudio, donadio, dovidio, gaudio, gladieux, medio, nordio, pappadio, samudio, servidio, taddeo, televideo, video, zamudio
Silvadio sounds like:
sailboat, salivate, salivated, salvati, salvato, salvetti, scalloped, scalped, sculpt, sculpted, sealift, shelved, slapped, sleeved, slept, slipped, sloboda, solved, sulfate, sulfide, sulfite, sulphate, sylphide, sylvite