173 entries under persistent topic. ×
| unmovable(adjective, calm, certain, still, limited) | |
| unquestioning(adjective, set, clear, solid, certain) | |
| allegiant(adjective, close, correct, continue, honest) | |
| eternal(adjective, wild, original, basic) | |
| everlasting(adjective, strong, tough, continuous) | |
| exacting(adjective, hard, tough, severe, rough) | |
| hard-line(adjective, strong, hard, tough, severe) | |
| hard-shelled(adjective, hard, tough, severe, rough) | |
| intense(adjective, clear, tough, severe, harsh) | |
| mutinous(adjective, obstinate, insistent, dogged) | |
| regular(adjective, dull, complete, solid, usual) | |
| set on(expression, adjective, determined, serious, resolute) | |
| uncooperative(adjective, mean, hard, obstinate) | |
| unending(adjective, continuous, endless, relentless) | |
| ungovernable(adjective, obstinate, insistent, dogged) | |
| unruly(adjective, obstinate, insistent, dogged) | |
| wayward(adjective, obstinate, insistent, dogged) | |
| cantankerous(adjective, tough, obstinate, stubborn) | |
| connected(adjective, dull, steady, stable, regular) | |
| cussed(adjective, tough, obstinate, stubborn) |
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| APA | Smart Define. (2016). firm thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/firm/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "firm thesaurus" https://smartdefine.org/firm/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, firm thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/firm/thesaurus/synonyms>. |
| MLA | Smart Define. "firm thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/firm/thesaurus/synonyms> |