Swelters rhymes with:
shelters, smelter's, smelters, altars, alters, defaulters, falters, filters, halter's, halters, psalters, quilters, realtor's, realtors, salter's, salters, saulters, shelters, smelter's, smelters, walter's, walters, walters', wolters
Swelters sounds like:
salter's, salters, saulters, selders, shelters, shoulders, slater's, slaters, slathers, soldier's, soldiers, soldiers', soliders