unpredictability vs capriciousness

unpredictability and capriciousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unpredictability	Yes	No	No	No
capriciousness	Yes	No	No	No

As nouns, unpredictability and capriciousness are synonyms defined as:

unpredictability and capriciousness: the quality of being guided by sudden unpredictable impulses

unpredictability (noun)	capriciousness (noun)
lacking predictability	the trait of acting unpredictably and more from whim or caprice than from reason or judgment
the trait of being unpredictably irresolute	the quality of being guided by sudden unpredictable impulses
the quality of being guided by sudden unpredictable impulses