Smelting rhymes with:
melting, belting, elting, kelting, melting, pelting, assaulting, belting, bolting, catapulting, consulting, defaulting, elting, exalting, exulting, faulting, halting, hoelting, insulting, jolting, kelting, malting, melting, molting, nolting, pelting, quilting, resulting, revolting, salting, somersaulting, stoelting, tilting, vaulting, wilting
Smelting sounds like:
simulating, simulations, simultaneous