Downpours rhymes with:
backdoors, baltimore's, bangalore's, becor's, bellcore's, bookstores, carnivores, centaur's, centaurs, centocor's, commodore's, dinosaurs, drugstores, ecuador's, encor's, encores, indoors, megastores, mentor's, nucor's, phosphors, salvador's, sophomores, superstores, toystores, unprofor's
Downpours sounds like:
dambrosia, dambrosio, dampers, dannenberg, danvers, denenberg, denver's, dombroski, dombrosky, dombrowski, donnybrook