Flats rhymes with:
blatz, glatz, latz, platts, platz, slats, at-bats, atz, bats, batts, batz, blatz, brats, bratz, cat's, cats, chats, chatz, chatz', combats, dats, datz, fats, gatz, glatz, gnats, gratz, hat's, hats, hatz, kats, katz, kratz, labatt's, latz, mats, mattes, matts, matz, nats, oshatz, pat's, pats, patz, platts, platz, prats, pratt's, rat's, rats, ratts, ratz, satz, schatz, shatz, slats, spats, spatz, stats, statz, that's, vats
Flats sounds like:
fallouts, falotico, faulds, faults, feldhaus, feltes, felts, feltus, feltz, field's, fieldhouse, fields, fields', fildes, filets, fillets, flatheads, flattish, fledge, fleet's, fleets, fleitas, floats, floods, flouts, fluids, flutes, folds, folts, foltz, foulds, fults, fultz