pallor vs paleness

pallor and paleness both are nouns.

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

As nouns, pallor and paleness are synonyms defined as:

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

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

pallor (noun)	paleness (noun)
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)	being deficient in color
	the property of having a naturally light complexion
	unnatural lack of color in the skin (as from bruising or sickness or emotional distress)