luridness vs lividity

luridness and lividity both are nouns.

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

As nouns, luridness and lividity are synonyms defined as:

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

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

luridness (noun)	lividity (noun)
the quality of being ghastly	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
the journalistic use of subject matter that appeals to vulgar tastes