59 entries under adjective topic. ×

10
understudy(noun, reserve, substitute, replacement)
5
backup(noun, increase, reserve, extra)
5
replacement(noun, spare, reserve, extra)
5
reserve(noun, increase, extra, substitute)
4
auxiliary(noun, increase, spare, supply)
4
deputy(noun, reserve, substitute, replacement)
4
stand-in(noun, reserve, substitute, replacement)
3
emergency(noun, increase, spare, reserve)
3
extra(noun, spare, reserve, replacement)
3
secondary(increase, reserve, subsidiary, supportive)
3
spare(noun, reserve, extra, replacement)
3
supplemental(increase, extra, auxiliary, supernumerary)
3
supplementary(increase, extra, auxiliary, supernumerary)
2
ancillary(extra, substitute, auxiliary, supernumerary)
2
supernumerary(extra, substitute, replacement, temporary)
1
additional(spare, extra, replacement, temporary)
1
artificial(extra, auxiliary, supernumerary)
1
new
1
odd(extra, replacement)
1
second-string
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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>