disorder vs untidiness

disorder and untidiness both are nouns.

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

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

disorder (noun)	untidiness (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	the condition of being untidy
a physical condition in which there is a disturbance of normal functioning

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