Oppermann rhymes with:
copperman, opperman, copperman, fesperman, hooperman, kipperman, kuperman, newspapermen, opperman, pepperman, superman, tepperman, upperman, vipperman
Oppermann sounds like:
o'beirne, o'brian, o'brien, o'bryan, o'byrne, obeirne, oberman, oberon, obrian, obrien, obryan, obyrne, offerman, offermann, operan, opperman, ovarian, overman, overran, overrun