evil vs evilness

evil and evilness both are nouns.

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

As nouns, evil and evilness are synonyms defined as:

evil and evilness: the quality of being morally wrong in principle or practice

evil (noun)	evilness (noun)
morally objectionable behavior	the quality of being morally wrong in principle or practice
the quality of being morally wrong in principle or practice

evil (adjective)	evilness (adjective)
morally bad or wrong
having or exerting a malignant influence
having the nature of vice