WordNet (r) 3.0 (2006):

back matter
    n 1: written matter following the main text of a book [syn:
         back matter, end matter]

Moby Thesaurus II by Grady Ward, 1.0:

96 Moby Thesaurus words for "back matter":
   PS, Parthian shot, acknowledgments, addendum, afterthought,
   appendix, article, back, bastard title, bibliography, book,
   catch line, catchword, chapter, chorus, clause, coda, codicil,
   colophon, conclusion, consequence, contents, contents page,
   continuance, continuation, copyright page, dedication, double take,
   dying words, endleaf, endpaper, endsheet, envoi, epilogue, errata,
   fascicle, flyleaf, folio, follow-through, follow-up, fore edge,
   foreword, front matter, gathering, half-title page, head, imprint,
   index, inscription, introduction, last words, leaf, makeup, number,
   page, paragraph, parting shot, passage, peroration, phrase,
   postface, postfix, postlude, postscript, preface, preliminaries,
   recto, refrain, reverso, running title, second thought, section,
   sentence, sequel, sequela, sequelae, sequelant, sequent, sequitur,
   sheet, signature, subscript, subtitle, suffix, supplement,
   swan song, table of contents, tag, tail, text, title, title page,
   trim size, type page, verse, verso