42 entries under auxiliary topic. ×

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experimental(extra, supernumerary)
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extra
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imitation(extra, supernumerary)
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near(extra, supernumerary)
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other(extra, supernumerary)
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provisional(extra, supernumerary)
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proxy(extra, substitute, supernumerary)
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pseudo(extra, supernumerary)
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replacement(extra, supernumerary)
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reserve(extra, subsidiary, supernumerary, supportive)
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second(extra, supernumerary)
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sham(extra, supernumerary)
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standby(reserve, extra, subsidiary, supernumerary)
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stopgap(extra, supernumerary)
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supernumerary
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supplemental(extra, supernumerary)
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supplementary(extra, supernumerary)
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supposititious(extra, supernumerary)
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surrogate(extra, supernumerary, back-up, flipside)
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symbolic(extra, supernumerary)
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APASmart Define. (2013). substitutive thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/substitutive/thesaurus/synonyms
ChicagoSmart Define. 2013. "substitutive thesaurus" https://smartdefine.org/substitutive/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2013, substitutive thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/substitutive/thesaurus/synonyms>.
MLASmart Define. "substitutive thesaurus" 17 June 2013. Web. 1 October 2026. <https://smartdefine.org/substitutive/thesaurus/synonyms>