Smelt rhymes with:
melt, belt, celt, dealt, dwelt, feldt, felt, heldt, helt, knelt, melt, pelt, svelte, vanpelt, velte, welt, welte
Smelt sounds like:
schmoldt, schoenwald, seasonality, senility, shinault, signaled, signalled, simulate, simulated, smallwood, smelled, smiled, sunlit, sunlite