scantness vs scantiness

scantness and scantiness both are nouns.

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

As nouns, scantness and scantiness are synonyms defined as:

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

scantness (noun)	scantiness (noun)
the quality of being meager	the quality of being meager
	Of a garment, the property of being very small, light, or revealing.