Religiosity rhymes with:
curiosity, animosity, atrocity, curiosity, ferocity, generosity, monstrosity, velocity, viscosity, 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, perversity, publicity, simplicity, specificity, toxicity, university, velocity, viscosity, voracity
Religiosity sounds like:
realestate, realist, realized, reallocate, reallocated, reelect, reelected, relaxed, released, relegate, relegated, relished, relocate, relocated, royalist