sloppiness vs untidiness

sloppiness and untidiness both are nouns.

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

As nouns, untidiness is a hypernym of sloppiness; that is, untidiness is a word with a broader meaning than sloppiness:

sloppiness (noun)	untidiness (noun)
the quality of not being careful or taking pains	the trait of being untidy and messy
falsely emotional in a maudlin way	the condition of being untidy
a lack of order and tidiness; not cared for
the wetness of ground that is covered or soaked with water