luridness vs lividness

luridness and lividness both are nouns.

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

As nouns, luridness and lividness are synonyms defined as:

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

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

luridness (noun)	lividness (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)
the journalistic use of subject matter that appeals to vulgar tastes