negligence vs neglectfulness

negligence and neglectfulness both are nouns.

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

As nouns, negligence and neglectfulness are synonyms defined as:

negligence and neglectfulness: the trait of neglecting responsibilities and lacking concern

Other synonyms of negligence include neglect.

negligence (noun)	neglectfulness (noun)
failure to act with the prudence that a reasonable person would exercise under the same circumstances	the trait of neglecting responsibilities and lacking concern
the trait of neglecting responsibilities and lacking concern