5
aid(noun, support, help, increase, praise)
5
championship(noun, support, help, assistance)
5
extra(noun, adjective, support, lower, copy)
5
help(noun, verb, support, increase, praise)
5
proxy(noun, agent, substitute, replacement, representative)
5
reliever
5
second(noun, help, inferior, insignificant, reserve)
5
standby(noun, adjective, increase, reserve, extra)
5
sub(noun, adjective, reserve, agent, substitute)
4
accompaniment(noun, support, help, assistance)
4
agent(noun, substitute, replacement, representative, alternative)
4
assistant(noun, help, informal, agent, subordinate)
4
dummy(noun, extra, replacement, alternative, alternate)
4
lieutenant(noun, informal, assistant, deputy)
4
musical accompaniment(noun, expression, idiom)
4
representative(noun, help, associate, agent, replacement)
4
token(noun, deputy)
3
assistance(noun, support, help, increase, praise)
3
attorney(noun, deputy)
3
computer backup(noun, expression, idiom)
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APASmart Define. (2015). backup thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/backup/thesaurus/synonyms
ChicagoSmart Define. 2015. "backup thesaurus" https://smartdefine.org/backup/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, backup thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/backup/thesaurus/synonyms>.
MLASmart Define. "backup thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/backup/thesaurus/synonyms>