thinness vs scantiness

thinness and scantiness both are nouns.

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

As nouns, scantiness is a hypernym of thinness; that is, scantiness is a word with a broader meaning than thinness:

Other hypernyms of thinness include exiguity, leanness, meagerness, meagreness, poorness, scantness.

As nouns, scantiness is a hypernym of thinness; that is, scantiness is a word with a broader meaning than thinness:

Other hypernyms of thinness include exiguity, leanness, meagerness, meagreness, poorness, scantness.

thinness (noun)	scantiness (noun)
the property of having little body fat	the quality of being meager
relatively small dimension through an object as opposed to its length or width	Of a garment, the property of being very small, light, or revealing.
a consistency of low viscosity
the property of being very narrow or thin
the property of being scanty or scattered; lacking denseness
The property of lacking substance or strength.