Unterberg rhymes with:
winterberg, achterberg, osterberg, westerberg, winterberg, achterberg, anderberg, cederberg, fagerberg, funderburg, osterberg, silberberg, silverberg, soderberg, soderbergh, underberg, vanderberg, vanderburg, westerberg, winterberg
Unterberg sounds like:
underberg, underbrush, underprice