Ester rhymes with:
amvestor, bester, brester, chester, esther, fester, hester, investor, ivester, jester, kester, leicester, lester, mclester, mester, mestre, molester, nester, nestor, pester, polyester, questar, requester, rester, semester, sequester, silvester, sylvester, sylvestre, tester, testor, trester, trimester, vestar, vester, westar, wester
Ester sounds like:
easter, ector, ecuador, equator, escudero, esther, estuary, executor, exeter, exterior, extra, eyster