impecuniousness vs poorness

impecuniousness and poorness both are nouns.

Word	Noun	Adjective	Verb	Adverb
impecuniousness	Yes	No	No	No
poorness	Yes	No	No	No

As nouns, poorness is a hypernym of impecuniousness; that is, poorness is a word with a broader meaning than impecuniousness:

impecuniousness: a state of lacking money
poorness: the state of having little or no money and few or no material possessions

Other hypernyms of impecuniousness include impoverishment, poverty.

impecuniousness (noun)	poorness (noun)
a state of lacking money	the quality of being poorly made or maintained
	less than adequate
	the quality of being meager
	the state of having little or no money and few or no material possessions