negligence vs nonperformance

negligence and nonperformance both are nouns.

Word	Noun	Adjective	Verb	Adverb
negligence	Yes	No	No	No
nonperformance	Yes	No	No	No

As nouns, negligence and nonperformance are synonyms defined as:

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

Other synonyms of negligence include carelessness, neglect.

negligence (noun)	nonperformance (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 trait of neglecting responsibilities and lacking concern