spareness vs sparseness

spareness and sparseness both are nouns.

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

As nouns, spareness and sparseness are synonyms defined as:

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

Other synonyms of spareness include sparsity, thinness.

spareness (noun)	sparseness (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