evilness vs badness

evilness and badness both are nouns.

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

As nouns, badness is a hypernym of evilness; that is, badness is a word with a broader meaning than evilness:

evilness: the quality of being morally wrong in principle or practice
badness: that which is below standard or expectations as of ethics or decency

Other hypernyms of evilness include immorality, bad.

evilness (noun)	badness (noun)
the quality of being morally wrong in principle or practice	that which is below standard or expectations as of ethics or decency
	used of the degree of something undesirable e.g. pain or weather
	an attribute of mischievous children