| place | |
| property | |
| resolute | |
| state(verb, adjective) | |
| steadfast | |
| thing | |
| tighten | |
| tough(noun, adjective) | |
| unaffected | |
| unyielding | |
| business organisation | |
| fasten | |
| persist | |
| purpose | |
| resist |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/firm/thesaurus/broader |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/broader (accessed September 23, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/firm/thesaurus/broader>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/firm/thesaurus/broader> |