Plunk rhymes with:
blunck, blunk, clunk, flunk, klunk, spelunk, blunck, blunk, brunk, brunke, bunk, bunke, chunk, clunk, crunk, debunk, drunk, dunc, dunk, finunc, flunk, funck, funk, funke, hunk, hunke, juhnke, junk, klunk, kuhnke, monk, munk, punk, ruhnke, runck, runk, schmunk, schunk, shrunk, shunk, skunk, spelunk, spunk, strunk, stunk, sunk, trunk, vandunk, yunk
Plunk sounds like:
palance, palansky, palauans, palinkas, palma's, palms, palonius, paulhamus, pauling, pavilions, pawling, peeling, peplinski, phalange, phalanges, phalanx, piling, pilings, pilling, pilnak, pipeline's, pipelines, pipelines', plaines, plains, plan's, planas, planck, plane's, planes, planes', plank, planks, planning, plans, plans', playing, plemmons, plemons, plenum's, plinius, plink, plonka, plonski, plowing, plowman's, plum's, plumage, plumages, plumes, plums, plunge, plunges, plying, polanco, polanski, polansky, polemic, polemics, polhamus, polhemus, poling, polinski, polinsky, pollens, polling, pollyannish, polonaise, polonsky, polynesia, pooling, poulenc, poulenc's, pulling, pullins, pullman's, pylons