Johnstown's rhymes with:
hometowns, levittown's, motown's, shantytowns, yorktown's, breakdowns, closedowns, countdowns, crackdowns, drawdowns, hometowns, levittown's, markdowns, motown's, putdowns, shakedowns, shantytowns, showdowns, shutdowns, slowdowns, southdown's, touchdowns, writedowns, yorktown's