Rumfelt rhymes with:
afheldt, heartfelt, lingerfelt, overfelt, rehfeldt, shanafelt, steinfeldt, afheldt, greenbelt, heartfelt, lingerfelt, overfelt, rehfeldt, roosevelt, seatbelt, shanafelt, steinfeldt, sunbelt
Rumfelt sounds like:
rainbolt, rambled, reinbold, reinbolt, rembold, rumbled, rumbold, rumpled