Sundown rhymes with:
rundown, rundown, turndown, 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, slowdown, southdown, touchdown, turndown, underdown, writedown
Sundown sounds like:
saindon, samedan, sandeen, sanden, sandin, sandino, sandman, sandmann, sandom, sandon, sandtown, sanitation, santana, santayana, santin, santini, santino, santon, santone, santoni, schwendeman, segmentation, sentman, shantytown, shenton, simonton, sindona, sindoni, sinton, smetana, smithtown, smitten, smoothen, snedden, sneddon, snethen, snowden, snowdon, somethin', sometime, sondheim, sumatoma, sumatomo, sumitomo, summation, sundeen, sundheim, sundin, suntan, swaminathan, swanton, swinton