Ontario's rhymes with:
defterios, defterios, scenarios, curios, defterios, florio's, mario's, scenarios, baggio's, berlioz, collosio's, colosio's, curios, daddy-o's, davio's, defterios, eugenio's, florio's, horatio's, ignacio's, mario's, rubios, scenarios, silvadio's, sylvio's, trafillio's, video's, videos