10
adjutant(noun, help, associate, reserve, assistant)
10
help(noun, verb, associate, addition, supporter)
10
reserve(noun, adjective, support, increase, lower)
10
second(noun, adjective, help, lower, spare)
9
deputy(noun, help, associate, reserve, agent)
9
appurtenant(adjective, support, spare, useful, reserve)
9
attendant(noun, adjective, person, guide, associate)
9
helping(adjective, assisting, aiding)
9
lieutenant(noun, help, agent, assistant, servant)
8
backup(noun, adjective, support, increase, lower)
8
collateral(adjective, help, lower, low, spare)
8
subservient(adjective, support, lower, aid, low)
7
aid(noun, companion, friend, servant, partner)
7
appendage(noun, part, extra, addition, extension)
7
companion(noun, adjective, guide, associate, reserve)
7
substitute(noun, reserve, extra, agent, alternative)
6
agent(noun, supply, agent, replacement, alternative)
6
addition(noun, part, extra, extension, accessory)
6
aide-de-camp(noun, supporter, assistant, servant, helper)
6
alternate(noun, inferior, insignificant, reserve, minor)
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APASmart Define. (2015). auxiliary thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/auxiliary/thesaurus/synonyms
ChicagoSmart Define. 2015. "auxiliary thesaurus" https://smartdefine.org/auxiliary/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, auxiliary thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/auxiliary/thesaurus/synonyms>.
MLASmart Define. "auxiliary thesaurus" 22 December 2015. Web. 24 September 2026. <https://smartdefine.org/auxiliary/thesaurus/synonyms>