Sunbelt rhymes with:
greenbelt, greenbelt, seatbelt, afheldt, greenbelt, heartfelt, lingerfelt, overfelt, rehfeldt, roosevelt, rumfelt, seatbelt, shanafelt, steinfeldt
Sunbelt sounds like:
sampled, schoenfeld, schoenfeldt, schonfeld, seinfeld, shanafelt, shaneyfelt, shenefield, simplot, sinibaldi, snowballed, sonnenfeld