neglect vs omission

neglect and omission both are nouns.

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

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

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

neglect (noun)	omission (noun)
failure to act with the prudence that a reasonable person would exercise under the same circumstances	a mistake resulting from neglect
willful lack of care and attention	neglecting to do something; leaving out or passing over something
the trait of neglecting responsibilities and lacking concern	any process whereby sounds or words are left out of spoken words or phrases
lack of attention and due care	something that has been omitted
the state of something that has been unused and neglected

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