THESAURUS
PS, Parthian shot, accession, accessory, accident, accidental, accompaniment, addenda, additament, addition, additive, additory, additum, adjunct, adjuvant, afterthought, annex, annexation, appanage, appendage, appendant, appendix, appurtenance, appurtenant, attachment, augment, augmentation, auxiliary, back matter, chorus, coda, codicil, collateral, colophon, complement, conclusion, concomitant, consequence, contingency, contingent, continuance, continuation, corollary, double take, dying words, envoi, epilogue, extension, extra, extrapolation, fixture, follow-through, follow-up, happenstance, incidental, increase, increment, inessential, last words, mere chance, nonessential, not-self, offshoot, other, parting shot, pendant, peroration, postface, postfix, postlude, postscript, refrain, reinforcement, rider, second thought, secondary, sequel, sequela, sequelae, sequelant, sequent, sequitur, side effect, side issue, subscript, subsidiary, suffix, superaddition, supplement, swan song, tag, tailpiece, undergirding, unessential
ROGET THESAURUS
Adjunct
N
adjunct, addition, additament, additum, affix, appelidage, annexe, annex, augment, augmentation, increment, reinforcement, supernumerary, accessory, item, garnish, sauce, accompaniment, adjective,
addendum, complement, supplement, continuation, rider, offshoot, episode, side issue, corollary, piece, flap, lappet, skirt, embroidery, trappings, cortege, tail, suffix, wing, additional, alate, alated, winged, in addition.