Poverty noun – The state of lacking sufficient money or material possessions. Sparsity and poverty are semantically related in scarcity topic. In some cases you can use "Sparsity" instead a noun "Poverty".
Sparsity noun – The property of being scanty or scattered; lacking denseness. Poverty and sparsity are semantically related in lack topic. You can use "Poverty" instead a noun "Sparsity", if it concerns topics such as insufficiency.