- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
87 entries under rigid topic. ×
| unsparing(adjective, strong, hard, tough, severe) | |
| acrimonious(adjective, tough, severe, harsh, grim) | |
| determined(adjective, severe, harsh, solid, intense) | |
| immutable(adjective, hard, resolute, inflexible) | |
| prudish(adjective, tough, severe, firm, harsh) | |
| resolute(adjective, hard, intense, inflexible) | |
| strait-laced(adjective, tough, severe, firm, harsh) | |
| strong(adjective, hard, tough, severe, sturdy) | |
| stubborn(adjective, strong, hard, tough, severe) | |
| authoritarian(adjective, strong, hard, tough, severe) | |
| fixed(adjective, hard, severe, stiff) | |
| taut | |
| concrete(adjective, correct, solid, exact, proper) | |
| hard-nosed(adjective, strong, hard, tough, severe) | |
| intractable(adjective, hard, resolute, inflexible) | |
| iron(hard, resolute, inflexible, strict) | |
| picky(adjective, tough, severe, fine, firm) | |
| poignant(adjective, severe, harsh, unpleasant, vicious) | |
| solid(adjective, complete, correct, severe, harsh) | |
| square(adjective, tough, severe, firm, harsh) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |