Matchlock rhymes with:
ashlock, blacklock, carlock, deadlock, erlach, flintlock, gridlock, hammerlock, havelock, hemlock, kalok, landlock, madlock, matlock, niblock, oarlock, overlock, padlock, portlock, roadblock, sealock, shedlock, sherlock, shylock, spurlock, subhlok, tatlock, warloeck, wedlock, wheelock, whitelock, whitlock, woodlock
Matchlock sounds like:
matchlocks, medical's, meticulous, mitchell's, modzelewski