14 entries under extension 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, addition)
9
addition(noun, part, extra, accessory)
9
fixture(noun, feature, part, extra, addition)
7
extra(noun, part, addition, accessory)
5
annex(noun, part, extra, addition)
5
auxiliary(noun, part, extra, addition)
4
accoutrement(noun, part, extra, equipment, addition)
4
part(noun, extra, addition, component)
0
adapter
0
fitting(noun, feature, part, extra, addition)
0
something joined(noun, expression, part, extra, addition)
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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>