evilness vs immorality

evilness and immorality both are nouns.

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

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

evilness: the quality of being morally wrong in principle or practice
immorality: the quality of not being in accord with standards of right or good conduct

Other hypernyms of evilness include bad, badness.

evilness (noun)	immorality (noun)
the quality of being morally wrong in principle or practice	morally objectionable behavior
	the quality of not being in accord with standards of right or good conduct