whimsicality vs flightiness

whimsicality and flightiness both are nouns.

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

As nouns, whimsicality and flightiness are synonyms defined as:

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

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

whimsicality (noun)	flightiness (noun)
the trait of behaving like an imp	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