sloppiness vs neglect

sloppiness and neglect both are nouns.

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

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

Other hyponyms of sloppiness include incaution, incautiousness, neglectfulness, negligence, unconscientiousness.

sloppiness (noun)	neglect (noun)
the quality of not being careful or taking pains	failure to act with the prudence that a reasonable person would exercise under the same circumstances
falsely emotional in a maudlin way	willful lack of care and attention
a lack of order and tidiness; not cared for	the trait of neglecting responsibilities and lacking concern
the wetness of ground that is covered or soaked with water	lack of attention and due care
	the state of something that has been unused and neglected

sloppiness (verb)	neglect (verb)
	leave undone or leave out
	give little or no attention to
	fail to attend to
	fail to do something; leave something undone