42 entries under auxiliary topic. ×

17
extra(noun, adjective, spare, extreme, reserve)
9
additional(adjective, extraordinary, new, spare, fresh)
5
supplementary(adjective, extraordinary, new, spare, fresh)
2
ancillary(adjective, extraordinary, new, spare, fresh)
2
another(adjective, extraordinary, new, spare, fresh)
2
other(adjective, extraordinary, new, spare, fresh)
2
reserve(adjective, extraordinary, new, spare, fresh)
2
standby(adjective, extra, substitute, replacement, temporary)
2
substitute(adjective, extra)
1
proxy(noun, extra)
1
stopgap(noun, extra)
1
supplemental(adjective, extraordinary, new, spare, fresh)
1
surrogate(noun, extra)
0
acting
0
alternate
0
alternative(extra, additional, another)
0
artificial
0
backup(adjective, reserve, extra, replacement, temporary)
0
counterfeit
0
dummy
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APASmart Define. (2015). supernumerary thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/supernumerary/thesaurus/synonyms
ChicagoSmart Define. 2015. "supernumerary thesaurus" https://smartdefine.org/supernumerary/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, supernumerary thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/supernumerary/thesaurus/synonyms>.
MLASmart Define. "supernumerary thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/supernumerary/thesaurus/synonyms>