Slowdown rhymes with:
lowdown, godown, hoedown, lowdown, showdown, ashdown, blastdown, breakdown, clampdown, closedown, comedown, countdown, crackdown, drawdown, godown, hillsdown, hoedown, knockdown, lansdowne, letdown, lockdown, lowdown, markdown, meltdown, piltdown, putdown, rundown, shakedown, shootdown, showdown, shutdown, southdown, sundown, touchdown, turndown, underdown, writedown
Slowdown sounds like:
saladin, saladino, salatino, saldana, salton, schlottman, scholten, schooltime, schulten, scialdone, seldane, selden, seldin, seldom, seldon, shackelton, shackleton, shelden, sheldon, shelton, skeleton, skelton, skilton, slaten, slaton, slatten, slatton, slayden, slaydon, slayton, sletten, soldan, soldano, solution, sultan, sulton