- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
74 entries under demanding topic. ×
| merciless(adjective, tough, severe, rough, difficult) | |
| murder(adjective, hard, great, tough, severe) | |
| perplexing(adjective, hard, fancy, severe, difficult) | |
| puzzling(adjective, hard, fancy, severe, difficult) | |
| recondite(adjective, hard, fancy, difficult, complex) | |
| rigid(adjective, hard, tough, severe, rough) | |
| strict(adjective, hard, tough, severe, rough) | |
| testing(adjective, tough, severe, difficult, violent) | |
| unsparing(adjective, tough, rough, difficult, harsh) | |
| unyielding(adjective, hard, tough, severe, grim) | |
| uphill battle(expression, adjective, tough, rough, difficult) | |
| problematical(adjective, difficult, complex, awkward) | |
| scabrous(adjective, tough, rough, difficult, heavy) | |
| slavish(adjective, tough, rough, difficult, heavy) |
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| APA | Smart Define. (2016). arduous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, arduous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>. |
| MLA | Smart Define. "arduous thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms> |