Heller's rhymes with:
bestsellers, bookcellars, cellars, dwellers, ehlers, ellers, fellers, keller's, propellers, resellers, sellars, seller's, sellers, sellers', spellers, teller's, tellers, zellars, zellers
Heller's sounds like:
haulers, healers, hewler's, hilarious, hillary's, hollars, hollers