disorder vs messiness

disorder and messiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
disorder	Yes	No	Yes	No
messiness	Yes	No	No	No

As nouns, messiness is a hyponym of disorder; that is, messiness is a word with a more specific, narrower meaning than disorder:

disorder (noun)	messiness (noun)
a disturbance of the peace or of public order	the trait of being untidy and messy
a condition in which things are not in their expected places	a state of confusion and disorderliness
a physical condition in which there is a disturbance of normal functioning

disorder (verb)	messiness (verb)
bring disorder to
disturb in mind or make uneasy or cause to be worried or alarmed