WordNet (r) 3.0 (2006):

accouterment
    n 1: clothing that is worn or carried, but not part of your main
         clothing [syn: accessory, accoutrement, accouterment]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "accouterment":
   armament, catering, chandlery, endowment, equipment, finding,
   fitting out, furnishing, furnishment, investment, logistics,
   outfitting, preparation, procurement, providing, provision,
   provisioning, purveyance, reinforcement, replenishment, resupply,
   retailing, selling, subsidization, subsidy, subvention, supply,
   supplying, victualing