59 entries under supplement topic. ×

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boost(noun, appendage, add-on)
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codicil(noun, increase, addition, additive)
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commission(noun, advantage, plus, appendage)
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enhancement(noun, increase, addition, complement)
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enlargement(noun, appendage, add-on)
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expansion(noun, appendage, add-on)
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fee(noun, prize, stock, reward, payment)
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flavor enhancer(noun, expression, attachment)
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hike(noun, appendage, add-on)
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optional extra(noun, expression, addition, attachment)
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payment(noun, share, reward, surplus, fee)
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postscript(noun, increase, addition, additive)
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preservative(noun, attachment)
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raise(noun, appendage, add-on)
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reinforcement(noun, complement, appendage, add-on)
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rider(noun, increase, addition, additive)
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rise(noun, appendage, add-on)
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something conjoined(expression, addition)
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wing(noun, appendage, add-on)
<123>
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APASmart Define. (2016). extra thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/extra/thesaurus/synonyms
ChicagoSmart Define. 2016. "extra thesaurus" https://smartdefine.org/extra/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, extra thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/extra/thesaurus/synonyms>.
MLASmart Define. "extra thesaurus" 30 March 2016. Web. 23 September 2026. <https://smartdefine.org/extra/thesaurus/synonyms>