sparsity vs spareness

sparsity and spareness both are nouns.

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

As nouns, sparsity and spareness are synonyms defined as:

sparsity and spareness: the property of being scanty or scattered; lacking denseness

Other synonyms of sparsity include sparseness, thinness.

sparsity (noun)	spareness (noun)
the property of being scanty or scattered; lacking denseness	the property of being scanty or scattered; lacking denseness
	the property of having little body fat