carelessness vs neglect

carelessness and neglect both are nouns.

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

As nouns, carelessness and neglect are synonyms defined as:

carelessness and neglect: failure to act with the prudence that a reasonable person would exercise under the same circumstances

Other synonyms of carelessness include negligence, nonperformance.

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

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

carelessness (noun)	neglect (noun)
failure to act with the prudence that a reasonable person would exercise under the same circumstances	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	willful lack of care and attention
	the trait of neglecting responsibilities and lacking concern
	lack of attention and due care
	the state of something that has been unused and neglected

carelessness (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