The Collaborative International Dictionary of English v.0.48:

Ossuary \Os"su*a*ry\, n.; pl. -ries. [L. ossuarium, fr.
   ossuarius of or bones, fr. os, ossis, bone: cf. F. ossuaire.]
   A place where the bones of the dead are deposited; a charnel
   house. [Obs.] --Sir T. Browne.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ossuary
    n 1: any receptacle for the burial of human bones

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "ossuary":
   barrow, beehive tomb, bone house, bone pot, box grave, burial,
   burial chamber, burial mound, catacombs, cenotaph, charnel house,
   cinerary urn, cist, cist grave, cromlech, crypt, deep six, dokhma,
   dolmen, funeral urn, grave, house of death, last home, long home,
   low green tent, low house, mastaba, mausoleum, monstrance,
   mummy chamber, narrow house, ossuarium, passage grave, pit,
   pyramid, reliquary, resting place, sepulcher, shaft grave, shrine,
   stupa, tomb, tope, tower of silence, tumulus, urn, vault