| accent(noun, addition, decoration, fixture) |
| accessary |
| accession(noun, extra, supplement, appendage) |
| accompaniment(noun, extra, addition, attachment, decoration) |
| accompanying(adjective, extra, additional, supplementary) |
| accrual(noun, extra, supplement, appendage) |
| add-ons(noun, supplement) |
| add on(noun, expression, supplement, add-ons) |
| added(extra, addition, additional, supplement) |
| added feature(noun, expression, increase, extra, addition) |
| added ingredient(noun, expression, attachment, supplement, add-ons) |
| addition help(expression, addition, attachment) |
| additional(adjective, extra, supplementary) |
| adjunction |
| adornment(noun, addition, decoration, fixture) |
| affixture |
| afterthought(addition, supplement) |
| aggrandizement(noun, extra, supplement, appendage) |
| ancillary(noun, adjective, extra, addition, additional) |
| annex(noun, increase, extra, addition, attachment) |