neglect vs carelessness

neglect and carelessness both are nouns.

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

As nouns, neglect and carelessness are synonyms defined as:

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

Other synonyms of neglect include negligence, nonperformance.

As nouns, carelessness is a hypernym of neglect; that is, carelessness is a word with a broader meaning than neglect:

Other hypernyms of neglect include sloppiness.

neglect (noun)	carelessness (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
willful lack of care and attention	the quality of not being careful or taking pains
the trait of neglecting responsibilities and lacking concern
lack of attention and due care
the state of something that has been unused and neglected

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