Treharne rhymes with:
hemmelgarn, trefgarne, aborn, acorn, adorn, airborne, alcorn, allcorn, amborn, arn, arne, arnn, barn, beirne, bighorn, bjoern, bjorn, bluhdorn, born, borne, bourn, bourne, bralorne, buckhorn, buckthorn, bullhorn, byrn, cairn, capricorn, carn, carne, chadbourne, colborn, colborne, corn, corne, cyberporn, darn, dearborn, deerborne, dezarn, dezern, doorn, dorn, eichorn, einhorn, elkhorn, firstborn, forewarn, forlorn, forsworn, garn, glyndebourne, hagadorn, halliciforn, harn, harne, hartshorn, hathorn, hawthorn, hawthorne, heckendorn, hegadorn, hemmelgarn, hirshhorn, horn, horne, ierne, inborn, jetborne, karn, keirn, kempthorne, kilborne, korn, lamborn, langhorn, langhorne, layborne, leghorn, longhorn, lorne, lowborn, mccarn, milbourn, milbourne, moderne, morn, mourn, nairn, nairne, newborn, obeirne, orn, orne, osborn, osborne, pangborn, pfefferkorn, polkinghorn, popcorn, porn, pronghorn, rabourn, radborne, radbourn, radbourne, raybourn, reborn, relearn, sanborn, schoellhorn, schorn, scorn, seaborne, shearn, sherbourn, sherbourne, shoehorn, shopkorn, shopworn, shorn, silverthorn, silverthorne, sonneborn, sporn, starn, steinborn, stillborn, sworn, terkhorn, thorn, thorne, torn, trefgarne, unadorn, unborn, unicorn, vandorn, vanhorn, vanhorne, varn, waldhorn, warn, warne, waterborne, wellborn, whitehorn, winterbourne, worn, yarn, zern, zorn
Treharne 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, treinen, tremain, tremaine, tremayne, treon, 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