mischievousness vs shenanigan

mischievousness and shenanigan both are nouns.

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

As nouns, mischievousness and shenanigan are synonyms defined as:

mischievousness and shenanigan: reckless or malicious behavior that causes discomfort or annoyance in others

Other synonyms of mischievousness include devilment, devilry, deviltry, mischief-making, mischief, rascality, roguery, roguishness.

mischievousness (noun)	shenanigan (noun)
reckless or malicious behavior that causes discomfort or annoyance in others	reckless or malicious behavior that causes discomfort or annoyance in others
an attribute of mischievous children	the use of tricks to deceive someone (usually to extract money from them)
the trait of behaving like an imp