48 entries under addition topic. ×

16
accessory(noun, adjective, feature, part, increase)
14
adjunct(noun, part, help, increase, extra)
13
appendage(noun, feature, part, increase, supply)
11
supplement(noun, part, increase, extra)
11
accompaniment(noun, part, accessory, decoration)
9
addendum(noun, attachment, supplement, accompaniment)
9
appendix(noun, document, accessory, attachment)
9
fixture(noun, feature, part, extra)
8
attachment(noun, feature, increase, extra)
7
extra(noun, part, extension, accessory)
6
component(noun, feature, component, fitting)
5
add-on(noun, extra, attachment, decoration)
5
annex(noun, part, extra, extension)
5
auxiliary(noun, part, extra, extension)
5
extension(noun, part, extra, decoration)
4
accoutrement(noun, part, extra, equipment)
4
part(noun, extra, component, extension)
2
adornment(noun, decoration, accompaniment, fixture)
2
apparatus(noun, tackle, accessory, things)
2
appliance(noun, feature, fitting, decoration)
<123>
10 years ago|5.6k views|share |citing 
APASmart Define. (2015). appurtenance thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/appurtenance/thesaurus/synonyms
ChicagoSmart Define. 2015. "appurtenance thesaurus" https://smartdefine.org/appurtenance/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, appurtenance thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/appurtenance/thesaurus/synonyms>.
MLASmart Define. "appurtenance thesaurus" 22 December 2015. Web. 25 September 2026. <https://smartdefine.org/appurtenance/thesaurus/synonyms>