Synonyms|683Antonyms|57|Broader|10Narrower|5Related|104

72 entries under adjective topic. ×

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supererogatory(reserve, extra, replacement, unused)
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superfluous(reserve, extra, replacement, unused)
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supernumerary(reserve, extra, replacement, unused)
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supplemental
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supplementary
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surplus(reserve, extra, replacement, unused)
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top-priority
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understudy(reserve, standby)
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unoccupied(reserve, extra, replacement, unused)
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unusual
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unwanted(reserve, extra, replacement, unused)
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vital
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APASmart Define. (2015). emergency thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/emergency/thesaurus/synonyms
ChicagoSmart Define. 2015. "emergency thesaurus" https://smartdefine.org/emergency/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, emergency thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/emergency/thesaurus/synonyms>.
MLASmart Define. "emergency thesaurus" 10 July 2015. Web. 26 September 2026. <https://smartdefine.org/emergency/thesaurus/synonyms>