Hefty rhymes with:
hefti, hefti, lefty, biosafety, crafty, drafty, fiftee, fifty, flightsafety, hefti, lefty, lofty, nifty, raffety, rufty, safety, shifty, thrifty
Hefty sounds like:
habit, habitat, haft, hafta, haupt, heaped, heaved, hebda, heft, hefti, hibbett, hobday, hobdy, hoeft, hoevet, hoofed, hoped, hopped, hopwood, houpt, hovda, hovde, how-about, huffed, hyped