penuriousness vs impoverishment

penuriousness and impoverishment both are nouns.

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

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

penuriousness: a state of lacking money
impoverishment: the state of having little or no money and few or no material possessions

Other hypernyms of penuriousness include poorness, poverty.

penuriousness (noun)	impoverishment (noun)
a disposition to be niggardly with money	the act of making someone poor
a state of lacking money	the state of having little or no money and few or no material possessions