Silvadio's rhymes with:
daddy-o's, video's, videos, baggio's, berlioz, collosio's, colosio's, curios, daddy-o's, davio's, defterios, eugenio's, florio's, horatio's, ignacio's, mario's, ontario's, rubios, scenarios, sylvio's, trafillio's, video's, videos
Silvadio's sounds like:
sailboats, sculpts, selvidge, slapdash, slivovitz, sulfites, sulphates