71 entries under replacement topic. ×

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odd(adjective, reserve, extra, unused)
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option(adjective, reserve, extra, unused)
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over(adjective, reserve, extra, unused)
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substitute batter
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supererogatory(adjective, reserve, extra, unused)
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superfluous(adjective, reserve, extra, unused)
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supernumerary(adjective, reserve, extra, temporary)
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surplus(adjective, reserve, extra, unused)
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unoccupied(adjective, reserve, extra, unused)
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unused(adjective, reserve, extra, standby)
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unwanted(adjective, reserve, extra, unused)
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APASmart Define. (2015). backup thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/backup/thesaurus/synonyms
ChicagoSmart Define. 2015. "backup thesaurus" https://smartdefine.org/backup/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, backup thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/backup/thesaurus/synonyms>.
MLASmart Define. "backup thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/backup/thesaurus/synonyms>