malignity vs malignancy

malignity and malignancy both are nouns.

Word	Noun	Adjective	Verb	Adverb
malignity	Yes	No	No	No
malignancy	Yes	No	No	No

As nouns, malignity and malignancy are synonyms defined as:

malignity and malignancy: quality of being disposed to evil; intense ill will

Other synonyms of malignity include malignance.

malignity (noun)	malignancy (noun)
quality of being disposed to evil; intense ill will	quality of being disposed to evil; intense ill will
wishing evil to others	(medicine) a malignant state; progressive and resistant to treatment and tending to cause death