Pileup rhymes with:
backup, blowup, breakup, buildup, burnup, buttercup, canup, checkup, cleanup, close-up, coverup, crudup, eggcup, followup, greenup, grownup, hangup, holdup, hookup, jessup, letup, lineup, linkup, lockup, makeup, markup, northup, pickup, printup, push-up, pushup, roundup, runup, setup, shakeup, speedup, stalcup, stallcup, standup, start-up, startup, teacup, tuneup, wakeup, walkup, warmup, windup, wisecup
Pileup sounds like:
pavlov, philby, philip, philipp, philippa, philippe, philippi, phillip, phillipe, phillipp, phillippe, phillippi, philp, pilaf, playboy, playoff, pleva, ploof, plop, plouff, plouffe, pluff, polevoi, polyp, pulp