disorder vs mussiness

disorder and mussiness both are nouns.

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

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

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

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