Questar rhymes with:
requester, sequester, requester, sequester, westar, wester, amvestor, bester, brester, chester, ester, esther, fester, hester, investor, ivester, jester, kester, leicester, lester, mclester, mester, mestre, molester, nester, nestor, pester, polyester, requester, rester, semester, sequester, silvester, sylvester, sylvestre, tester, testor, trester, trimester, vestar, vester, westar, wester
Questar sounds like:
qatar, quadra, quattro, quieter, quitter