penuriousness vs stinginess

penuriousness and stinginess both are nouns.

Word	Noun	Adjective	Verb	Adverb
penuriousness	Yes	No	No	No
stinginess	Yes	No	No	No

As nouns, stinginess is a hypernym of penuriousness; that is, stinginess is a word with a broader meaning than penuriousness:

penuriousness: a disposition to be niggardly with money
stinginess: a lack of generosity; a general unwillingness to part with money

penuriousness (noun)	stinginess (noun)
a disposition to be niggardly with money	a lack of generosity; a general unwillingness to part with money
a state of lacking money