badness vs mischievousness

badness and mischievousness both are nouns.

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

As nouns, badness and mischievousness are synonyms defined as:

Other synonyms of badness include naughtiness.

badness (noun)	mischievousness (noun)
that which is below standard or expectations as of ethics or decency	reckless or malicious behavior that causes discomfort or annoyance in others
used of the degree of something undesirable e.g. pain or weather	an attribute of mischievous children
an attribute of mischievous children	the trait of behaving like an imp