Flours rhymes with:
flowers, flowers', clowers, flowers, flowers', bauers, bowers, clowers, devours, empowers, flowers, flowers', fowers, hour's, hours, jowers, ours, overpowers, power's, powers, powers', sauers, scours, showers, souers, sours, superpowers, tower's, towers, towers'
Flours sounds like:
failures, feelers, fellers, felrice, filers, fillers, flares, fliers, floors, florek, flores, florescue, florez, florio's, floris, flourish, flourishes, flowers, flowers', fluor's, fluoresce, flurries, flyers, followers, fowler's, fuller's