Answer:
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Plant whose name sounds like a dish full of dairy spread.
how many letters are there in the alphabet
They try to beat me, they try in vain. And when I win, I end the pain.
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
You use it between your head and your toes, the more it works the thinner it grows.