Crumble rhymes with:
grumble, rumble, trumble, trumbull, bumble, fumble, grumble, gumbel, humble, jumble, kumble, mumble, rumble, stumble, trumble, trumbull, tumble, umbel, umble
Crumble sounds like:
carnevale, carnival, chernobyl, cranfill, crumbley, crumple