whimsey vs whimsicality

whimsey and whimsicality both are nouns.

Word	Noun	Adjective	Verb	Adverb
whimsey	Yes	No	No	No
whimsicality	Yes	No	No	No

As nouns, whimsey and whimsicality are synonyms defined as:

whimsey and whimsicality: the trait of acting unpredictably and more from whim or caprice than from reason or judgment

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

whimsey (noun)	whimsicality (noun)
the trait of acting unpredictably and more from whim or caprice than from reason or judgment	the trait of behaving like an imp
an odd or fanciful or capricious idea	the trait of acting unpredictably and more from whim or caprice than from reason or judgment