Echelon rhymes with:
avalon, babylon, carillon, cephalon, epsilon, avalon, babylon, carillon, cephalon, epsilon, fenelon, guslan, halon, nylon, pylon, vanderlaan, waylon
Echelon sounds like:
eaglin, echlin, eglin, ekholm, escalona, eshelman, eshleman, esselman, excelan, exclaim, exline