Treon rhymes with:
eritrean, breon, epicurean, eritrean, korean, rijn, achaean, aegean, asean, boolean, breon, cyclopean, eon, epicurean, eritrean, european, feehan, fujian, galilean, heon, ian, indo-european, jacobean, jian, keehan, korean, maccabean, mcgeean, mckeon, mckeone, meehan, mycenaean, paean, peon, plebeian, protean, rijn, shahian, sheahan, sheehan, sofian, teahan, teehan, tennessean, theon, vannguyen, vian
Treon sounds like:
taormina, tarin, tarman, tarnow, tarom, teheran, teherani, tehran, tehrani, teran, terhune, term, terman, termine, termini, terrain, terrana, terrano, terrien, theorem, therani, therein, thereon, therien, therm, thermae, thermo, theron, therrien, thoren, thorium, thorman, thorn, thorne, thorny, throm, throne, thrown, thrun, thurm, thurman, thurmon, thurn, thurnau, tiernan, tierney, tierno, tirana, tirane, tirone, torain, toran, toren, torian, torino, torma, torme, tormey, torn, torney, torno, tornow, torreon, torumi, tourney, trahan, trahern, train, traina, trainee, trainmen, tram, tran, trane, trani, tranum, traum, trauma, traynham, treen, treharne, treinen, tremain, tremaine, tremayne, triana, triano, trim, trimm, trine, trinh, troiani, troiano, troma, tron, trone, troon, troyan, trueman, truman, try-on, tryin', tryon, turano, turenne, turin, turman, turn, turney, turnham, tyranny, tyrone, tyrrhenian