| seconder | |
| sectary | |
| sentry(noun, control, duty, reliable, responsible) | |
| sider | |
| spared | |
| sparer | |
| spear-carrier | |
| sponsor | |
| stopgap(supply, extra, agent, replacement, alternate) | |
| succedaneum(supply, agent, replacement, alternative, alternate) | |
| supe | |
| super | |
| supplanter(supply, agent, replacement, alternative, alternate) | |
| supply(agent, replacement, alternative, alternate, backup) | |
| supporting actor | |
| supporting cast | |
| sympathiser | |
| sympathizer | |
| temp(noun, supply, reserve, substitute, replacement) | |
| temporary expedient(expression, supply, agent, replacement, alternate) |
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| APA | Smart Define. (2015). standby thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/standby/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "standby thesaurus" https://smartdefine.org/standby/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, standby thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/standby/thesaurus/synonyms>. |
| MLA | Smart Define. "standby thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/standby/thesaurus/synonyms> |