neglectfulness vs sloppiness

neglectfulness and sloppiness both are nouns.

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

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

neglectfulness: the trait of neglecting responsibilities and lacking concern
sloppiness: the quality of not being careful or taking pains

Other hypernyms of neglectfulness include carelessness.

neglectfulness (noun)	sloppiness (noun)
the trait of neglecting responsibilities and lacking concern	the quality of not being careful or taking pains
	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