- Definitions|2
- Thesaurus|3.3k
- Abbreviations|0
109 entries under hard topic. ×
| iron(adjective, persistent, rigid, obstinate) | |
| merciless(adjective, rough, harsh, cruel) | |
| rough(adjective, strong, tough, severe) | |
| serious(adjective, strong, tough, severe) | |
| stiff-necked(adjective, strong, tough, severe) | |
| brutal(adjective, tough, severe, rough) | |
| inclement(adjective, tough, severe, rough) | |
| by the book(expression, adjective, idiom, strong) | |
| callous(adjective, tough, severe, rough) | |
| dense(adjective, strong, tough, sturdy) | |
| disciplinary(adjective, strong, tough, severe) | |
| flinty(adjective, strong, tough, severe) | |
| grievous(adjective, tough, severe, difficult) | |
| hard-core(adjective, close, strong, tough) | |
| implacable(adjective, set, strong, tough) | |
| ironclad(adjective, set, severe, harsh) | |
| steely(adjective, set, strong, tough) | |
| unforgiving(adjective, rough, harsh, cruel) | |
| bitter(adjective, strong, tough, severe) | |
| arduous(adjective, tough, severe, rough) |
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| APA | Smart Define. (2015). strict thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/strict/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, strict thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>. |
| MLA | Smart Define. "strict thesaurus" 3 August 2015. Web. 24 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms> |