lividness vs lividity

lividness and lividity both are nouns.

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

As nouns, lividness and lividity are synonyms defined as:

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

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

lividness (noun)	lividity (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