scantiness vs sparsity

scantiness and sparsity both are nouns.

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

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

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

scantiness (noun)	sparsity (noun)
the quality of being meager	the property of being scanty or scattered; lacking denseness
Of a garment, the property of being very small, light, or revealing.