lividity vs lividness

lividity and lividness both are nouns.

Word	Noun	Adjective	Verb	Adverb
lividity	Yes	No	No	No
lividness	Yes	No	No	No

As nouns, lividity and lividness are synonyms defined as:

lividity and lividness: unnatural lack of color in the skin (as from bruising or sickness or emotional distress)

Other synonyms of lividity include achromasia, luridness, paleness, pallidness, pallor, wanness.

lividity (noun)	lividness (noun)
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)	unnatural lack of color in the skin (as from bruising or sickness or emotional distress)
a state of fury so great the face becomes discolored