side issue

41 Moby Thesaurus words for "side issue":
      accession, accessory, accompaniment, addenda, addendum, additament,
      addition, additive, additory, additum, adjunct, adjuvant, annex,
      annexation, appanage, appendage, appendant, appurtenance,
      appurtenant, attachment, augment, augmentation, by-product, coda,
      complement, concomitant, continuation, corollary, extension,
      extrapolation, fixture, increase, increment, offshoot, outgrowth,
      pendant, reinforcement, side effect, supplement, tailpiece,
      undergirding