spareness vs sparsity

spareness and sparsity both are nouns.

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

As nouns, spareness and sparsity are synonyms defined as:

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

Other synonyms of spareness include sparseness, thinness.

spareness (noun)	sparsity (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