WordNet (r) 3.0 (2006):

junior high school
    n 1: a secondary school usually including 7th and 8th grades
         [syn: junior high school, junior high]

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "junior high school":
   Gymnasium, Latin school, Realgymnasium, Realschule, academy,
   grammar school, high, high school, intermediate school,
   junior high, middle school, prep school, preparatory school,
   public school, secondary school, seminary, senior high,
   senior high school