supplement Synonyms

appendix affix append addition increment rider sequel strengthen suffix supplemental supplementary supplementation suppletive surcharge replenishment replenish replenishing indestructibility insert insertion intensify lengthen magnify makeweight postlude postscript protraction raise reinforce swell tailpiece widen end matter hike up jack up eke out bump up extrapolation mark up finalize pullout snowboarder top up back matter round out add-on step-up follow-up add to annexe