scantiness vs leanness

scantiness and leanness both are nouns.

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

As nouns, scantiness and leanness are synonyms defined as:

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

scantiness (noun)	leanness (noun)
the quality of being meager	the property of having little body fat
Of a garment, the property of being very small, light, or revealing.	the quality of being meager