Touchdown rhymes with:
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, sundown, turndown, underdown, writedown
Touchdown sounds like:
tajikistan, taketomi, taxation, techsystem, testimony, teston, thackston, thaxton, tighten, tjaden, touchstone, touchton, tsutomu, tustin