different between capricious vs capriciousness

English

Borrowed from French capricieux, from Italian capriccioso, from capriccio.

capricious (comparative more capricious, superlative most capricious)

Impulsive and unpredictable; determined by chance, impulse, or whim.
Synonyms: arbitrary, whimsical, fickle
Antonyms: conscientious, rigorous

capricious +? -ness

capriciousness (uncountable)

The quality of being capricious.
- 1827 Jeremy Bentham, John Stuart Mill - Rationale of Judicial Evidence, Specially Applied to English Practice
  To employ always the same witnesses, he would excite speculation, and expose himself to the imputation of fickleness or capriciousness.

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