Antonyms for the word "sparsenesses" include dense, abundant, plentiful, thick, and copiousness. These words refer to the opposite of sparseness, which is the state of being sparse or having a limited quantity or spacing. When something is dense or thick, it means that there is a lot of it in a given area, while something that is abundant or plentiful means that there is a surplus or abundance of it. Copiousness, on the other hand, refers to a large quantity or abundance of something that is often associated with the idea of generosity and abundance. By using antonyms like these, we can convey a more precise meaning and avoid ambiguity in our language.