28 entries under supplement topic. ×

16
accessory(noun, adjective, feature, part, increase)
14
adjunct(noun, part, help, increase, extra)
13
appendage(noun, feature, part, increase, supply)
11
accompaniment(noun, part, addition, accessory, decoration)
9
addendum(noun, addition, attachment, accompaniment)
9
addition(noun, part, extra, extension, accessory)
9
appendix(noun, addition, document, accessory, attachment)
8
attachment(noun, feature, increase, extra, addition)
7
extra(noun, part, addition, extension, accessory)
5
add-on(noun, extra, addition, attachment, decoration)
5
auxiliary(noun, part, extra, addition, extension)
5
extension(noun, part, extra, addition, decoration)
3
concomitant
2
augmentation
2
complement(noun, addition, accessory, attachment)
2
garnish(noun, accessory, accompaniment)
1
bonus(noun, addition)
1
supernumerary(noun, addition)
1
treat(noun, addition)
1
trimming(noun, verb, addition, accessory, decoration)
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APASmart Define. (2015). appurtenance thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/appurtenance/thesaurus/synonyms
ChicagoSmart Define. 2015. "appurtenance thesaurus" https://smartdefine.org/appurtenance/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, appurtenance thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/appurtenance/thesaurus/synonyms>.
MLASmart Define. "appurtenance thesaurus" 22 December 2015. Web. 24 September 2026. <https://smartdefine.org/appurtenance/thesaurus/synonyms>