97 entries under adjective topic. ×

14
substitute(noun, support, cover, ability)
11
auxiliary(noun, support, increase, lower)
11
backup(noun, support, increase, lower)
11
spare(noun, verb, support, keep)
10
extra(noun, support, lower, spare)
8
alternate(noun, cover, lower, inferior)
8
secondary(support, increase, spare, inferior)
6
supportive(spare, subsidiary, auxiliary)
4
deputy(noun, cover, replacement, alternative)
4
understudy(noun, substitute, replacement, alternative)
4
unused(extraordinary, new, spare, fresh)
3
emergency(increase, spare, extra, replacement)
3
in store(expression, extraordinary, new, spare)
3
new(extraordinary, spare, fresh, special)
3
perk(extraordinary, new, spare, fresh)
3
replacement(noun, cover, near, extra)
3
stand-in(noun, cover, substitute, replacement)
3
standby(noun, increase, extra, substitute)
3
support(noun, ability, property, store)
2
additional(extraordinary, new, spare, fresh)
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APASmart Define. (2015). reserve thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/reserve/thesaurus/synonyms
ChicagoSmart Define. 2015. "reserve thesaurus" https://smartdefine.org/reserve/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, reserve thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/reserve/thesaurus/synonyms>.
MLASmart Define. "reserve thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/reserve/thesaurus/synonyms>