23 entries under substitute topic. ×

10
understudy(noun, adjective, reserve, replacement)
5
backup(noun, adjective, increase, reserve, extra)
5
replacement(noun, adjective, spare, reserve, extra)
5
reserve(noun, adjective, increase, extra)
4
auxiliary(noun, adjective, increase, spare, supply)
4
deputy(noun, adjective, reserve, replacement)
4
stalwart(noun, reserve, fallback)
4
stand-in(noun, adjective, reserve, replacement)
3
assistant(noun, reserve, replacement, alternate)
3
double(noun, cover, reserve, replacement)
3
fill-in(noun, cover, reserve, replacement)
3
second(extra, replacement, auxiliary, supernumerary)
3
successor(noun, cover, reserve, replacement)
2
ancillary(adjective, extra, auxiliary, supernumerary)
2
relief(noun, reserve, replacement, alternate)
2
sub(noun, cover, reserve, replacement)
2
supernumerary(adjective, extra, replacement, temporary)
2
surrogate(noun, supply, extra, agent)
2
temporary(noun, reserve, extra, replacement)
1
locum(supply, agent, replacement, alternate)
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APASmart Define. (2015). standby thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/standby/thesaurus/synonyms
ChicagoSmart Define. 2015. "standby thesaurus" https://smartdefine.org/standby/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, standby thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/standby/thesaurus/synonyms>.
MLASmart Define. "standby thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/standby/thesaurus/synonyms>