Okon rhymes with:
aiton, aon, bastone, briggstone, brimstone, cellphone, cerbone, citroen, gambone, glendon, halcyone, hendon, keown, ketone, lactone, marylebone, milhoan, moton, pharaon, pistone, provolone, rendon, shadoan, shimon, shimone, smothermon, tabone
Okon sounds like:
o'cana, o'guin, o'guinn, o'hagan, o'kane, o'keson, o'quinn, oakman, ocain, ocana, occasion, occhino, ocean, oceana, oceania, ocon, ogan, ogoni, oguin, oguinn, ohagan, okane, okano, okasan, oken, okeson, okin, okinawa, oksana, okuma, okun, okuno, oquin, oquinn, osama, osamu, oshima, oshman, osman, osmena, osmium, osmon, osmun, ossman, osuna, oxen, oxman, oxygen, ozanne, ozmun, ozone, ozuna