whimsy vs capriciousness

whimsy and capriciousness both are nouns.

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

As nouns, whimsy and capriciousness are synonyms defined as:

whimsy and capriciousness: the trait of acting unpredictably and more from whim or caprice than from reason or judgment

Other synonyms of whimsy include arbitrariness, flightiness, whimsey, whimsicality.

whimsy (noun)	capriciousness (noun)
the trait of acting unpredictably and more from whim or caprice than from reason or judgment	the trait of acting unpredictably and more from whim or caprice than from reason or judgment
an odd or fanciful or capricious idea	the quality of being guided by sudden unpredictable impulses