124 entries under hard topic. ×
| rooted(verb, adjective, strong, secure) | |
| unalterable(adjective, strong, secure, severe) | |
| secure(adjective, strong, sound, tough) | |
| solid(adjective, set, strong, sound) | |
| tight(adjective, adverb, close, strong) | |
| frozen(adjective, calm, firm, solid) | |
| hard-nosed(adjective, mean, secure, rough) | |
| set in stone(expression, adjective, idiom, mean) | |
| confirmed(verb, adjective, set, complete) | |
| dogged(adjective, mean, tough, firm) | |
| mulish(adjective, mean, firm, determined) | |
| tough(adjective, mean, strong, sound) | |
| concentrated(verb, adjective, set, strong) | |
| hanging tough(expression, adjective, mean, determined) | |
| strong(adjective, sound, secure, tough) | |
| close(adjective, set, strong, slight) | |
| inalterable(adjective, set, regular, rigid) | |
| intractable(adjective, tough, rough, firm) | |
| true(adjective, clear, strong, sound) | |
| cemented(noun, verb, adjective, strong) |
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| APA | Smart Define. (2016). fixed thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/fixed/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fixed thesaurus" https://smartdefine.org/fixed/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, fixed thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/fixed/thesaurus/synonyms>. |
| MLA | Smart Define. "fixed thesaurus" 16 March 2016. Web. 21 September 2026. <https://smartdefine.org/fixed/thesaurus/synonyms> |