Appendix

11 clues
Add on
Book end?
Supplement
Book feature
Book addendum
Book attachment
Book supplement
Stuff in the back
Back-of-the-book section
Supplement at the end of a book
Supplementary material at the end of a document
Similar answers:
Acappella
Acappellazinger
Accentshappen
Accentswillhappen
Accidentshappen
Aintgonnahappen
Alltappedout
Amanwrappedupin
Andhappenedtospot
Appeal
Appealbutitis
Appealed
Appealedcarrots
Appealedto
Appealing
Appealinglawyer
Appealingly
Appeals
Appealsto
Appealstreason