Flatheads rhymes with:
whitehead's, airheadz, arrowheads, beachheads, blockheads, bulkheads, bullheads, copperheads, deadheads, egghead's, eggheads, foreheads, loggerheads, overheads, skinheads, warheads, whitehead's
Flatheads sounds like:
fallouts, falotico, faulds, faults, feldhaus, feltes, felts, feltus, feltz, field's, fieldhouse, fields, fields', fildes, filets, fillets, flats, flattish, fledge, fleet's, fleets, fleitas, floats, floods, flouts, fluids, flutes, folds, folts, foltz, foulds, fults, fultz