pallidness vs pallid

pallidness is a noun but pallid is not a noun.

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

pallidness (noun)	pallid (noun)
unnatural lack of color in the skin (as from bruising or sickness or emotional distress)

pallidness (adjective)	pallid (adjective)
	abnormally deficient in color as suggesting physical or emotional distress
	lacking in vitality or interest or effectiveness
	(of light) lacking in intensity or brightness; dim or feeble