Gaithersburg rhymes with:
kaysersberg, parkersburg, petersburg, st_petersburg, ainsberg, augsburg, cannonsburg, carlsberg, duesberg, ellsberg, ellsburg, galesburg, gettysburg, ginsburg, ginzberg, greensburg, herzberg, holidaysburg, jewelsburg, kanegsberg, kaysersberg, koenigsberg, kongsberg, kosberg, kozberg, landsberg, leesburg, parkersburg, petersburg, ransburg, regensburg, romesburg, salzberg, salzburg, st_petersburg, twinsburg, wensberg, williamsburg, williamsburgh