Words That Rhyme With "Duper" :
2 syllables:
beeper, bleeper, blooper, blucher, bluebird, bopper, brooder, Buber, Buder, caper, capper, cheaper, chipper, choper, chopper, clapper, clipper, Clopper, cooper, cooter, coper, copper, cougar, Cowper, crapper, creeper, cropper, croupier, crupper, cupper, cuter, Dnieper, draper, dropper, euchre, euchred, flapper, flipper, fluter, fouter, fruiter, gaper, gipper, goober, gripper, grouper, Gruber, guber, hepar, Hepper, hipper, hooper, hooter, hoper, hopper, Huber, hyper, Jaipur, kapor, kapur, keeper, Kiper, kipper, knapper, Kruger, Kuiper, kupper, lapper, leaper, leper, lepper, lipper, looper, looter, loper, lopper, Luber, lucre, luger, luter, mapper, mopper, mucor, napper, neeper, Neper, neuter, Newburgh, nipper, paper, pauper, peeper, pepper, pewter, piper, pipper, popper, proper, propper, raper, rapper, reaper, rhubarb, ripper, rooter, roper, routers, ruder, Rupert, Ruter, sapor, sapper, schnapper, Schubert, scooper, scooter, scraper, scrapper, scupper, shaper, shipper, shooter, shopper, sipper, skipper, slapper, sleeper, slipper, sloper, snapper, sniper, snooper, Soper, sopor, souter, steeper, stepper, stooper, stoper, stopper, strapper, striper, stripper, Stuber, Studer, stupor, suber, sucre, suiter, suitor, super, supper, sweeper, taper, tapir, tapper, tipper, toper, Topor, topper, trapper, tripper, trooper, trouper, tuber, Tudor, tutor, uber, upper, vapor, viper, weeper, whapper, whipper, whooper, whopper, wiper, Woburn, wrapper, zapper, zipper
3 syllables:
accouter, accoutre, accoutred, commuter, computer, confuter, dispauper, improper, intruder, mosstrooper, polluter, preluder, rebuker, recruiter, refuter, repaper, saluter, unstopper, untutored, uprooter