Roadblock rhymes with:
niblock, subhlok, ashlock, blacklock, carlock, deadlock, erlach, flintlock, gridlock, hammerlock, havelock, hemlock, kalok, landlock, madlock, matchlock, matlock, niblock, oarlock, overlock, padlock, portlock, sealock, shedlock, sherlock, shylock, spurlock, subhlok, tatlock, warloeck, wedlock, wheelock, whitelock, whitlock, woodlock
Roadblock sounds like:
redpolls, retablos, roadblocks