pallidity vs paleness

pallidity and paleness both are nouns.

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

As nouns, pallidity and paleness are synonyms defined as:

pallidity (noun)	paleness (noun)
being deficient in color	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)