Ethnos rhymes with:
agnos, buenos, campesinos, catacosinos, chanos, constantinos, damianos, galanos, genoese, janos, katsanos, kronos, latinos, pahnos, panos, prinos, telefonos, tesobonos, thanos, troyanos, vranos, winos
Ethnos sounds like:
eating, eaton's, eddings, eddins, edens, editing, edition's, editions, ethnic, ethnics, ethnos's, euthanasia, euthanasia's, euthanize, eyewitness, eyewitnesses