Zwahlen rhymes with:
wahlen, wollen, befallen, bollen, carollan, collen, dahlen, fallen, golen, guatemalan, hollan, hollen, hollon, nolen, nollan, olen, pollan, pollen, punsalan, sahlen, smolen, stalin, stollen, tholen, wahlen, wollen
Zwahlen sounds like:
zalm, zalman, zeglin, zelem, zeleny, zelina, zellman, zelma, zelman, zillion, zlin, zollman, zolman, zulma