different between mounding vs hounding

English

mounding

mounding (plural moundings)

A mound of material.
- 1866, Journal of the Royal Agricultural Society of England
  The tipping or emptying of waggons commences, and, as in embankments or moundings in a railway, they advance over the deposit as it reaches the desired height.

From hound +? -ing.

hounding

hounding (plural houndings)

Pursuit, especially when persistent or relentless.
- 2011, "Embraceable you", The Economist, 30 Jul 2011:
  Elsewhere, the hounding of Muhammad Yunus, a Nobel laureate and founder of the Grameen Bank who briefly flirted with politics, was vindictive.
(nautical) The part of a mast below the hounds and above the deck.

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