negligence vs sloppiness

negligence and sloppiness both are nouns.

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

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

Other hypernyms of negligence include carelessness.

negligence (noun)	sloppiness (noun)
failure to act with the prudence that a reasonable person would exercise under the same circumstances	the quality of not being careful or taking pains
the trait of neglecting responsibilities and lacking concern	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