- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
67 entries under problematic topic. ×
| grim(tough, severe, weighty, trying) | |
| hard-won(tough, severe, painful, trying) | |
| immense(tough, severe, painful, trying) | |
| problem(tough, severe, painful, trying) | |
| prohibitive(tough, severe, painful, trying) | |
| rigid(adjective, hard, tough, severe, rough) | |
| testing(adjective, tough, severe, difficult, violent) | |
| unyielding(adjective, hard, tough, severe, grim) | |
| upstream(tough, severe, painful, trying) | |
| argumentative(tough, trying) | |
| bearish(tough, trying) | |
| boorish(tough, trying) | |
| fastidious(tough, trying) | |
| fractious(tough, trying) | |
| hard to please(expression, idiom, tough, trying) | |
| impolite(tough, trying) | |
| intractable(tough, trying, disorderly, unruly) | |
| irritable(tough, trying) | |
| oafish(tough, trying) | |
| obstreperous(tough, trying) |
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| APA | Smart Define. (2016). arduous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, arduous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>. |
| MLA | Smart Define. "arduous thesaurus" 26 February 2016. Web. 20 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms> |