- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
58 entries under heavy topic. ×
| severe(adjective, strong, hard, tough, correct) | |
| hard(adjective, strong, tough, severe, rough) | |
| exacting(adjective, hard, tough, severe, fine) | |
| demanding(adjective, hard, severe, rough, difficult) | |
| difficult(adjective, hard, severe, rough, harsh) | |
| tough(adjective, strong, hard, severe, rough) | |
| oppressive(adjective, hard, tough, severe, rough) | |
| arduous(adjective, hard, tough, severe, rough) | |
| rough(adjective, strong, hard, tough, severe) | |
| exigent(adjective, difficult, severity, taxing) | |
| laborious(adjective, hard, tough, severe, rough) | |
| burdensome(adjective, hard, severe, rough, difficult) | |
| onerous(adjective, hard, severe, rough, difficult) | |
| exhausting(adjective, hard, tough, severe, rough) | |
| strenuous(adjective, hard, tough, severe, rough) | |
| effortful(adjective, tough, rough, difficult, harsh) | |
| formidable(adjective, hard, tough, severe, rough) | |
| heavy(adjective, strong, hard, tough, severe) | |
| intricate(adjective, tough, rough, difficult) | |
| mean(adjective, tough, severe, rough, difficult) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |