Mumbles rhymes with:
crumbles, fumbles, grumbles, humbles, rumbles, stumbles, tumbles, ambles, assembles, brambles, campbell's, campbells, crumbles, cymbals, ensembles, fumbles, gamble's, gambles, grumbles, humbles, kimball's, resembles, rumbles, scrambles, shambles, stumbles, symbol's, symbols, tumbles, wombles
Mumbles sounds like:
maniples, manville's, maples, minneapolis, minneapolis's, mobil's, mobile's, mobiles, mobilize, monfils, monopoles, monopolies, monopolize, monopolizes, muffles