173 entries under persistent topic. ×
| standardized(adjective, dull, steady, stable, regular) | |
| together(adjective, calm, strong, secure, solid) | |
| tried-and-true(adjective, good, strong, honest, solid) | |
| unbroken(adjective, dull, complete, steady, stable) | |
| unceasing(adjective, strong, determined, steady) | |
| unconquerable(adjective, obstinate, insistent, dogged) | |
| uninterrupted(adjective, dull, complete, steady, stable) | |
| unregenerate(adjective, obstinate, insistent, dogged) | |
| wrongheaded(adjective, obstinate, insistent, dogged) | |
| ceaseless(adjective, continuous, endless, relentless) | |
| hard-as-nails(adjective, serious, resolute, unwavering) | |
| neverending(adjective, steady, resolute, continuous) | |
| resounding(definite, unqualified, uncompromising, unrelenting) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |