thinness vs sparsity

thinness and sparsity both are nouns.

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

As nouns, thinness and sparsity are synonyms defined as:

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

Other synonyms of thinness include spareness, sparseness.

thinness (noun)	sparsity (noun)
the property of having little body fat	the property of being scanty or scattered; lacking denseness
relatively small dimension through an object as opposed to its length or width
a consistency of low viscosity
the property of being very narrow or thin
the property of being scanty or scattered; lacking denseness
The property of lacking substance or strength.