Two Syllables
bester, brester, chester, ester, esther, fester, hester, jester, kester, leicester, lester, mester, mestre, nester, nestor, pester, questar, rester, tester, testor, trester, vestar, vester, westar, wester
Three Syllables
amvestor, investor, ivester, mclester, molester, requester, semester, sequester, silvester, sylvester, sylvestre, trimester