balefulness vs mischief

balefulness and mischief both are nouns.

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

As nouns, balefulness and mischief are synonyms defined as:

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

Other synonyms of balefulness include maleficence.

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