THESAURUS
PS, Parthian shot, addendum, affix, afterthought, allonge, appendix, back matter, chorus, coda, codicil, colophon, commentary, conclusion, consequence, continuance, continuation, double take, dying words, enclitic, envoi, epilogue, follow-through, follow-up, infix, interlineation, interpolation, last words, marginalia, note, parting shot, peroration, postface, postfix, postlude, prefix, proclitic, refrain, rider, scholia, second thought, sequel, sequela, sequelae, sequelant, sequent, sequitur, subscript, suffix, supplement, swan song, tag, tail
ROGET THESAURUS
Sequel
N
sequel, suffix, successor, tail, queue, train, wake, trail, rear, retinue, suite, appendix,
postscript, epilogue, peroration, codicil, continuation, sequela, appendage, tail piece, heelpiece, tag, more last words, colophon, aftercome, aftergrowth, afterpart, afterpiece, aftercourse, afterthought, aftergame, arriere pensee, second thoughts, outgrowth.