scantiness vs thinness

scantiness and thinness both are nouns.

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

As nouns, thinness is a hyponym of scantiness; that is, thinness is a word with a more specific, narrower meaning than scantiness:

Other hyponyms of scantiness include wateriness, abstemiousness, spareness, sparseness, sparsity.

scantiness (noun)	thinness (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.	relatively small dimension through an object as opposed to its length or width
	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.