Perversity rhymes with:
biodiversity, diversity, university, biodiversity, diversity, university, analyticity, animosity, atrocity, audacity, biodiversity, capacity, complexity, complicity, curiosity, density, diversity, domesticity, eccentricity, elasticity, electricity, falsity, felicity, ferocity, generosity, incapacity, intensity, laxity, monstrosity, necessity, obesity, opacity, overcapacity, paucity, perplexity, publicity, religiosity, simplicity, specificity, toxicity, university, velocity, viscosity, voracity
Perversity sounds like:
prefabricate, prefabricated, prevaricate, prevaricated