Kappler rhymes with:
coupler, doppler, epler, eppler, hepler, heppler, hippler, kempler, kepler, keppler, krempler, oppler, peppler, poplar, sampler, shepler, stempler, templar, wampler, weppler
Kappler sounds like:
kabler, kapler, kappeler, keebler, kepler, keppler, kevlar, kibler, kobler, koffler, kofler, kubler, kuebler