Synonyms to second thought

addendum, 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, secondary, sequel, sequela, sequelae, sequelant, sequent, sequitur, side effect, side issue, subscript, subsidiary, suffix, superaddition, supplement, swan song, tag, tailpiece, undergirding, unessential, about-face, afterthoughts, app