mischief vs balefulness

mischief and balefulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
mischief	Yes	No	No	No
balefulness	Yes	No	No	No

As nouns, mischief and balefulness are synonyms defined as:

mischief and balefulness: the quality or nature of being harmful or evil

Other synonyms of mischief include maleficence.

mischief (noun)	balefulness (noun)
reckless or malicious behavior that causes discomfort or annoyance in others	the quality or nature of being harmful or evil
the quality or nature of being harmful or evil