scantiness vs poorness

scantiness and poorness both are nouns.

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

As nouns, scantiness and poorness are synonyms defined as:

Other synonyms of scantiness include exiguity, leanness, meagerness, meagreness, scantness.

scantiness (noun)	poorness (noun)
the quality of being meager	the quality of being poorly made or maintained
Of a garment, the property of being very small, light, or revealing.	less than adequate
	the quality of being meager
	the state of having little or no money and few or no material possessions