abuse vs child neglect

abuse and child neglect both are nouns.

Word	Noun	Adjective	Verb	Adverb
abuse	Yes	No	Yes	No
child neglect	Yes	No	No	No

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

abuse: cruel or inhumane treatment
child neglect: failure of caretakers to provide adequate emotional and physical care for a child

Other hyponyms of abuse include child abuse, persecution, cruelty, inhuman treatment.

abuse (noun)	child neglect (noun)
improper or excessive use	failure of caretakers to provide adequate emotional and physical care for a child
cruel or inhumane treatment
a rude expression intended to offend or hurt

abuse (verb)	child neglect (verb)
change the inherent purpose or function of something
use wrongly or improperly or excessively
use foul or abusive language towards
treat badly