preparatory school(n = noun.group) prep school - a private secondary school;
is a kind of gymnasium, lycee, lyceum, middle school, secondary school
has particulars: choir school, schola cantorum

N  school, academy, university, alma mater, college, seminary, Lyceum, institute, institution, palaestra, Gymnasium, class, seminar, day school, boarding school, preparatory school, primary school, infant school, dame's school, grammar school, middle class school, Board school, denominational school, National school, British and Foreign school, collegiate school, art school, continuation school, convent school, County Council school, government school, grant-in-aid school, high school, higher grade school, military school, missionary school, naval school, naval academy, state-aided school, technical school, voluntary school, school, school of art, kindergarten, nursery, creche, reformatory, pulpit, lectern, soap box desk, reading desk, ambo, lecture room, theater, auditorium, amphitheater, forum, state, rostrum, platform, hustings, tribune, school book, horn book, text book, grammar, primer, abecedary, rudiments, manual, vade mecum, encyclopedia, cyclopedia, Lindley Murray, Cocker, dictionary, lexicon, professorship, lectureship, readership, fellowship, tutorship, chair, School Board Council of Education, Board of Education, Board of Studies, Prefect of Studies, Textbook Committee, propaganda, scholastic, academic, collegiate, educational, ex cathedra.

art school, ashcan school, barbison school, barbizon school, boarding school, business school, catholic school, charter school, choir school, church school, composite school, comprehensive school, correspondence school, dance school, dancing school, day school, dental school, direct-grant school, driving school, elementary school, engineering school, finishing school, flying school, grad school, grade school, graduate school, grammar school, high school, historical school, hudson river school, industrial school, infant school, intermediate school, junior high school, junior school, language school, law school, medical school, middle school, music school, night school, normal school, nursery school, nursing school, old school, old school tie, open classroom school, parochial school, prep school, preparatory, primary school, private school, public school, reform school, religious school, riding school, sabbath school, school, school assignment, school bell, school board, school bus, school crossing, school day, school dictionary, school district, school newspaper, school of dentistry, school of law, school of medicine, school of music, school of nursing, school of thought, school paper, school phobia, school principal, school ship, school superintendent, school system, school teacher, school term, school text, school year, secondary modern school, secondary school, secretarial school, senior high school, special school, summer school, sunday school, sunday school class, technical school, trade school, training school, vested school, veterinary school, vocational school