pallor vs achromasia

pallor and achromasia both are nouns.

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

As nouns, pallor and achromasia are synonyms defined as:

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

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

pallor (noun)	achromasia (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)