mischievousness vs whimsicality

mischievousness and whimsicality both are nouns.

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

As nouns, mischievousness and whimsicality are synonyms defined as:

Other synonyms of mischievousness include impishness, puckishness.

mischievousness (noun)	whimsicality (noun)
reckless or malicious behavior that causes discomfort or annoyance in others	the trait of behaving like an imp
an attribute of mischievous children	the trait of acting unpredictably and more from whim or caprice than from reason or judgment
the trait of behaving like an imp