sloppiness vs wetness

sloppiness and wetness both are nouns.

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

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

sloppiness: the wetness of ground that is covered or soaked with water
wetness: the condition of containing or being covered by a liquid (especially water)

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