59 entries under supplement topic. ×

19
accessory(noun, adjective, support, part, lower)
18
supernumerary(noun, adjective, spare, extreme, reserve)
14
added(noun, adjective, increase, new, spare)
14
addition(noun, part, increase, advantage, extension)
13
bonus(noun, adjective, gain, benefit, advantage)
13
luxury(noun, adjective, comfort, treat, extravagance)
10
adjunct(noun, part, increase, addition, extension)
9
addendum(noun, increase, addition, accessory, attachment)
9
attachment(noun, addition, accessory, decoration)
8
dividend(noun, prize, advantage, share, stock)
7
appendage(noun, part, increase, addition, extension)
7
frill(noun, treat, luxury, extravagance, addition)
6
appurtenance(noun, part, addition, extension, accessory)
5
extension(noun, part, increase, addition, accessory)
5
surcharge(noun, fee, tax, appendage)
4
additive(noun, increase, addition, ingredient)
4
trimming(noun, edge, addition, bound, border)
3
accompaniment(noun, addition, attachment, complement, decoration)
3
appendix(noun, increase, addition, attachment, decoration)
3
complement(noun, increase, addition, accessory, attachment)
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APASmart Define. (2016). extra thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extra/thesaurus/synonyms
ChicagoSmart Define. 2016. "extra thesaurus" https://smartdefine.org/extra/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, extra thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extra/thesaurus/synonyms>.
MLASmart Define. "extra thesaurus" 30 March 2016. Web. 21 September 2026. <https://smartdefine.org/extra/thesaurus/synonyms>