WordNet (r) 3.0 (2006):

basic training
    n 1: the initial period of training for new military personnel;
         involves intense physical activity and behavioral
         discipline

Moby Thesaurus II by Grady Ward, 1.0:

64 Moby Thesaurus words for "basic training":
   apprenticeship, arrangement, breaking, breeding, briefing,
   clearing the decks, conditioning, cultivation, development,
   discipline, drill, drilling, equipment, exercise, familiarization,
   fetching-up, fixing, fostering, foundation, grooming, groundwork,
   housebreaking, improvement, in-service training, makeready,
   making ready, manual training, manufacture, military training,
   mobilization, nurture, nurturing, on-the-job training, planning,
   practice, prearrangement, preliminaries, preliminary,
   preliminary act, preliminary step, prep, preparation,
   preparatory study, preparing, prepping, prerequisite, pretreatment,
   processing, propaedeutic, provision, raising, readying, rearing,
   rehearsal, sloyd, spadework, training, treatment, trial, tryout,
   upbringing, vocational education, vocational training, warm-up