Underplay rhymes with:
overplay, display, overplay, play, redisplay, replay, aaa, allais, allay, ballet, blay, bley, boulais, boulay, cabriolet, calais, callais, chevrolet, clay, delay, display, filet, fillet, flay, imlay, klay, kley, lait, langlais, lay, laye, lei, ley, leyh, maclay, mcclay, mclay, millay, olay, overplay, palais, play, redisplay, replay, schley, slay, sleigh, souffle, valet, zalay