Walts rhymes with:
waltz, assaults, balt's, basalts, defaults, exalts, faults, halts, kuralt's, malts, paltz, renault's, salts, vaults, waltz
Walts sounds like:
waldeck, waldoch, waldock, wall-tex, wallets, walthose, waltz, waltzes, wealths, weld's, welds, welltech, weltz, wields, wilde's, wildes, wilds, wildwoods, willets, willetts, willits, wilts, wiltse, wiltsey, wiltsie, wiltz, woltz