add-on Synonyms

supplement plug-in addition accessory improver appurtenance affix extension extra append addendum appendage attachment therapeutics wing tailpiece supplementation module patch supplementary peripheral postscript premium preservative rider subsidiary suffix more supplemental throw in add to add-in add-ons extra feature something added add on to add ornament supplementary item supplemental add-on add-on item supplementary building added on additions flavor enhancer build on accessorize afterword p.s. plugin supplements