scantness vs sparseness

scantness and sparseness both are nouns.

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

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

Other hyponyms of scantness include wateriness, abstemiousness, spareness, sparsity, thinness, thinness.

scantness (noun)	sparseness (noun)
the quality of being meager	the property of being scanty or scattered; lacking denseness