Johnstown rhymes with:
shiremanstown, cooperstown, hagerstown, jamestown, lordstown, moorestown, shiremanstown, youngstown, adamstown, allentown, baytown, beantown, beardstown, boomtown, bridgetown, cape-town, capetown, charlestown, charlottetown, chinatown, cooperstown, crosstown, downingtown, elizabethtown, foodtown, freetown, georgetown, germantown, hagerstown, hometown, jamestown, koreatown, levittown, lordstown, marshalltown, middletown, midtown, moorestown, morgantown, morristown, motown, newtown, newtowne, provincetown, sandtown, shantytown, shiremanstown, smalltown, smithtown, stanleytown, tarrytown, tinseltown, watertown, williamstown, yorktown, youngstown
Johnstown sounds like:
jamestown, johnston, johnstone, jonestown, junction