sparseness vs sparsity

sparseness and sparsity both are nouns.

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

As nouns, sparseness and sparsity are synonyms defined as:

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

Other synonyms of sparseness include spareness, thinness.

sparseness (noun)	sparsity (noun)
the property of being scanty or scattered; lacking denseness	the property of being scanty or scattered; lacking denseness