60 entries under addition topic. ×

25
auxiliary(noun, adjective, support, part, help)
21
ancillary(noun, adjective, support, help, aid)
21
associate(noun, person, reserve, supporter)
20
extra(noun, adjective, support, part, lower)
18
adjunct(noun, adjective, drop, part, help)
16
appurtenance(noun, feature, part, increase, treat)
14
subordinate(noun, adjective, support, person, help)
13
additional(noun, adjective, subordinate, subsidiary)
13
appendage(noun, feature, drop, part, cover)
12
supplement(noun, part, increase, extra)
11
partner(noun, person, help, aid, associate)
11
supplementary(adjective, support, low, inferior, subject)
10
attachment(noun, feature, part, increase, extra)
10
supplemental(adjective, useful, minor, helpful)
8
extension(noun, part, extra, ornament)
7
accompaniment(noun, part, decoration, supplement)
7
accoutrement(noun, part, extra, extension)
7
addendum(noun, extra, attachment, supplement)
7
fixture(noun, feature, part, extra)
6
appendix(noun, part, extra, ornament)
<123>
10 years ago|17k views|share |citing 
APASmart Define. (2016). accessory thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/accessory/thesaurus/synonyms
ChicagoSmart Define. 2016. "accessory thesaurus" https://smartdefine.org/accessory/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, accessory thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/accessory/thesaurus/synonyms>.
MLASmart Define. "accessory thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/accessory/thesaurus/synonyms>