Koppell rhymes with:
coppel, copple, koppel, kopple, coppel, copple, hoppel, hopple, koppel, kopple, oppel, poppell, popple, stoppel, topple
Koppell sounds like:
kabbalah, kabel, kabila, kable, kabul, kaplow, kappel, kauble, keeble, keevil, kepley, keppel, kepple, keville, kibbel, kibble, kibell, kivela, kobel, koble, koebel, koeppel, kopel, koppel, kopple, koval, kubala, kubly, kufahl, kuffel, kvale