45 Moby Thesaurus words for "by product":
   afterbirth, afterclap, aftercrop, aftereffect, afterglow,
   aftergrowth, afterimage, aftermath, afterpain, aftertaste,
   consequence, consequent, corollary, derivation, derivative,
   descendant, development, distillate, effect, event, eventuality,
   eventuation, fruit, harvest, issue, legacy, logical outcome,
   offshoot, offspring, outcome, outgrowth, placenta, precipitate,
   product, result, resultant, secundines, sequel, sequela, sequence,
   sequent, side effect, side issue, spin-off, upshot