different between cruelty vs wretchedness

English

From Middle English cruelte, from Old French crualté (French cruauté), from Latin crudelitas. Surface analysis: cruel +? -ty.

cruelty (countable and uncountable, plural cruelties)

(uncountable) An indifference to suffering or pleasure in inflicting suffering.
Synonyms: mercilessness, barbarism, ruthlessness
Antonym: mercy
(countable) A cruel act.

wretched +? -ness

wretchedness (usually uncountable, plural wretchednesses)

An unhappy state of mental or physical suffering.
- 1811, Jane Austen, Sense and Sensibility, chapter 3
  She saw only that he was quiet and unobtrusive, and she liked him for it. He did not disturb the wretchedness of her mind by ill-timed conversation.
A state of prolonged misfortune, privation, or anguish.

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