niggardliness vs meanness

niggardliness and meanness both are nouns.

Word	Noun	Adjective	Verb	Adverb
niggardliness	Yes	No	No	No
meanness	Yes	No	No	No

As nouns, niggardliness and meanness are synonyms defined as:

Other synonyms of niggardliness include closeness, minginess, niggardness, parsimoniousness, parsimony, tightfistedness, tightness.

niggardliness (noun)	meanness (noun)
extreme stinginess	the quality of being deliberately mean
	extreme stinginess