different between decomposition vs spoiling

English

de- +? composition

decomposition (countable and uncountable, plural decompositions)

A biological process through which organic material is reduced to e.g. compost.
The act of taking something apart, e.g. for analysis.
- 2005, Gerard Chollet, Anna Esposito, Marcos Faundez-Zanuy, Nonlinear Speech Modeling and Applications
  Speech decomposition into a periodic and a non-periodic part is a subject of considerable importance with applications in speech synthesis, […]
The splitting (of e.g. a matrix, an atom, or a compound) into constituent parts.

spoiling

spoiling (plural spoilings)

plunder; pillage
- May 10, 1775, Benjamin Franklin, Proposed Preamble to a Congressional Resolution on Privateering
  […] all the spoilings, thefts, burnings of houses and towns, and murders of innocent people, perpetrated by their wicked and inhuman corsairs on our coasts […]

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