Tester rhymes with:
testor, amvestor, bester, brester, chester, ester, 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, testor, trester, trimester, vestar, vester, westar, wester
Tester sounds like:
taster, tastier, teaster, tessitore, testor, testuro, texstar, texter, textor, texture, thaxter, tighter, toaster, together, toystore, tschetter, twister