- Definitions|1
- Thesaurus|483
- Abbreviations|0
189 entries under adjective topic. ×
| adamantine(strong, hard, tough, sturdy) | |
| ardent(close, correct, firm, honest) | |
| deep | |
| deep-rooted | |
| dyed-in-the-wool(close, strong, hard, tough) | |
| enduring(close, correct, firm, honest) | |
| entrenched | |
| firm(close, strong, hard, tough) | |
| flinty(strong, hard, tough, severe) | |
| grim(strong, hard, tough, severe) | |
| immovable(strong, hard, tough, firm) | |
| implacable(strong, hard, tough, severe) | |
| inexorable(strong, hard, tough, severe) | |
| loyal(close, correct, firm, honest) | |
| relentless(strong, hard, tough, severe) | |
| rigorous(strong, hard, tough, severe) | |
| rooted | |
| settled | |
| steely(strong, hard, tough, severe) | |
| true-blue(close, correct, firm, honest) |
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| APA | Smart Define. (2016). hard-core thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/hard-core/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "hard-core thesaurus" https://smartdefine.org/hard-core/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, hard-core thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/hard-core/thesaurus/synonyms>. |
| MLA | Smart Define. "hard-core thesaurus" 28 March 2016. Web. 24 September 2026. <https://smartdefine.org/hard-core/thesaurus/synonyms> |