different between jumbling vs rumbling

English

jumbling

jumbling (plural jumblings)

The act by which something is jumbled or confused.
- 1730, Jonathan Swift, A Panegyrick on the Dean
  Nor is your Skill, or Labour less, / When bent upon some smart Lampoon, / You toss and turn your Brain till Noon; / Which, in its Jumblings round the Skull, / Dilates, and makes the Vessel full […]

rumbling (comparative more rumbling, superlative most rumbling)

rumbling (plural rumblings)

A muted sound of complaint or discontent.
The rumblings of the masses precede the crumbling of the state.
A deep low noise.
The rumbling of distant thunder echoed from the hilltop.

rumbling

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