- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
443 entries under adjective topic. ×
| methodical(noun, correct, solid, perfect) | |
| puritanical(tough, severe, firm, harsh) | |
| raw | |
| unchangeable(hard, resolute, rigid, inflexible) | |
| undeviating(severe, harsh, solid, exact) | |
| unsparing(strong, hard, tough, severe) | |
| acrimonious(tough, severe, harsh, grim) | |
| acute | |
| adamantine(set, strong, hard, tough) | |
| bleak(tough, severe, harsh, cruel) | |
| brisk(severe, stringent, drastic) | |
| challenging(difficult, awkward, thorough, demanding) | |
| crisp | |
| detail oriented(exact, strict, scrupulous, detailed) | |
| determined(severe, harsh, solid, intense) | |
| diligent | |
| disciplined | |
| exhausting(hard, tough, severe, rough) | |
| flawless(right, perfect, exact, proper) | |
| flinty(strong, hard, tough, severe) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 23 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |