Platitude rhymes with:
fortitude, ineptitude, rectitude, fortitude, ineptitude, rectitude, solicitude, turpitude, altitude, amplitude, aptitude, attitude, certitude, d'etude, exactitude, fortitude, gratitude, ineptitude, latitude, longitude, magnitude, multitude, rectitude, servitude, solicitude, solitude, turpitude, verisimilitude
Platitude sounds like:
palate, paled, palette, pallet, pallett, pallid, palo-alto, paoletti, pauletta, paulette, paulita, payload, peeled, peladeau, pellet, pelleted, pellett, pelot, pelt, pelted, pelto, peopled, philida, piebald, pilat, pilato, piled, pilot, piloted, pilotte, plaid, plait, plaited, plata, plate, plateau, plateaued, plated, plath, plato, platt, platte, platy, plaudit, plaut, played, plead, pleaded, pleat, pled, pleiad, plett, plied, plitt, plod, plodded, plot, plott, plotted, plowed, plude, pluta, pluth, pluto, plywood, pohlad, poletti, polite, politi, polito, politte, polity, polled, pollet, pollett, pollitt, pollute, polluted, pooled, populate, populated, pouliot, pulido, pulled, pullout, pulte