Plop rhymes with:
flop, glop, klopp, lop, lopp, slop, atop, bop, bopp, chop, chopp, cop, copp, crop, cropp, dopp, drop, flop, glop, gropp, hop, hopp, hoppe, jopp, klopp, knop, knopp, kopp, koppe, kropp, lop, lopp, mop, nonstop, op, opp, paap, paape, pop, popp, poppe, prop, propp, raap, ropp, schaap, schopp, schoppe, schropp, shop, shoppe, skop, slop, sop, sopp, stop, swap, swapp, top, topp, tropp, tschopp, wop, yopp
Plop sounds like:
pavlov, philby, philip, philipp, philippa, philippe, philippi, phillip, phillipe, phillipp, phillippe, phillippi, philp, pilaf, pileup, playboy, playoff, pleva, ploof, plouff, plouffe, pluff, polevoi, polyp, pulp