| not permanent(expression, idiom) | |
| proxy(extra, replacement, alternative, alternate, auxiliary) | |
| quickly | |
| reserve(extra, substitute, replacement, alternate, stalwart) | |
| standby(noun, reserve, extra, substitute, replacement) | |
| succedaneum(noun, replacement, alternative, alternate, backup) | |
| surrogate(adjective, extra, substitute, replacement, alternative) | |
| temporarily | |
| time | |
| transmigratory(adjective, migratory) | |
| unpredictable | |
| untrustworthy(adjective, dubious, unreliable, brief, passing) | |
| vanishing(adjective, brief, transient, transitory, short-lived) | |
| vicarious(extra, auxiliary, supernumerary) | |
| active | |
| atypical | |
| backup(reserve, extra, substitute, replacement, alternative) | |
| conditional(adjective, unsettled, tentative, speculative, contingent) | |
| convertible | |
| counterfeit(extra, auxiliary, supernumerary) |
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| APA | Smart Define. (2016). temporary thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/temporary/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "temporary thesaurus" https://smartdefine.org/temporary/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, temporary thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/temporary/thesaurus/synonyms>. |
| MLA | Smart Define. "temporary thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/temporary/thesaurus/synonyms> |