- Definitions|2
- Thesaurus|1.8k
- Abbreviations|0
75 entries under demanding topic. ×
| slavish(adjective, tough, rough, difficult, heavy) | |
| sticky(adjective, tough, rough, difficult, heavy) | |
| terrible(adjective, tough, rough, difficult, intense) | |
| tiring(adjective, hard, tough, severe, rough) | |
| toilful(adjective, tough, rough, difficult, heavy) | |
| unforgiving(adjective, hard, tough, severe, harsh) | |
| uphill battle(expression, adjective, tough, rough, difficult) | |
| wearing(adjective, tough, rough, difficult, heavy) | |
| wearying(adjective, tough, rough, difficult, heavy) | |
| awkward(adjective, difficult, grueling, problematical) | |
| bothersome(adjective, tough, rough, difficult, heavy) | |
| herculean(adjective, tough, rough, difficult, heavy) | |
| problematical(adjective, difficult, awkward, grueling) | |
| testing(adjective, severe, difficult, violent, awkward) | |
| wearisome(adjective, tough, rough, difficult, heavy) |
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| APA | Smart Define. (2016). rigorous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/rigorous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "rigorous thesaurus" https://smartdefine.org/rigorous/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, rigorous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/rigorous/thesaurus/synonyms>. |
| MLA | Smart Define. "rigorous thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/rigorous/thesaurus/synonyms> |