Roggenbuck rhymes with:
hagenbuch, hagenbuch, hagenbuch, hornbeak, bobak, brebach, chrobak, chubbuck, dubuc, hagenbuch, harbuck, heimbuch, hornbeak, hrabak, kobak, lubbock, rabuck, rebuck, robak, robuck, rybak, shebek, xebec
Roggenbuck sounds like:
reichenbach, rickenbach, riggenbach, rockenbach, rosenbach, rosenbeck