whimsy vs whimsicality

whimsy and whimsicality both are nouns.

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

As nouns, whimsy and whimsicality are synonyms defined as:

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

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

whimsy (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