pallidness vs pallor

pallidness and pallor both are nouns.

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

As nouns, pallidness and pallor are synonyms defined as:

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

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

pallidness (noun)	pallor (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)