bubbling

1. To produce bubbles, to rise up in bubbles (such as in foods cooking or liquids boiling).
2. To churn or foment, as if wishing to rise to the surface.

   Rage bubbled inside him.

3. To rise through a medium or system, similar to the way that bubbles rise in liquid.
4. To cheat, delude.
5. To cry, weep.
6. To pat a baby on the back so as to cause it to belch.
7. To cause to feel as if bubbling or churning.
8. To express in a bubbly or lively manner.
9. To form into a protruding round shape.
10. To cover with bubbles.
11. To bubble in; to mark a response on a form by filling in a circular area (‘bubble’).

noun

The action or motion of something that bubbles.