pallor vs lividness

pallor and lividness both are nouns.

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

As nouns, pallor and lividness are synonyms defined as:

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

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

pallor (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)