- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
134 entries under difficult topic. ×
| uphill battle(expression, adjective, tough, rough) | |
| various(adjective, hard, fancy, complex) | |
| wheels within wheels(expression, adjective, idiom, hard, fancy) | |
| artificial(adjective, tortuous, labored, tortured) | |
| austere(adjective, severe, harsh, heavy) | |
| clamorous(adjective, hard, tough, challenging) | |
| criminal(adjective, unpleasant, grim, savage) | |
| destroying(adjective, unpleasant, grim, savage) | |
| feller | |
| full of twists and turns(expression, adjective, idiom, complex) | |
| problematical(adjective, complex, awkward, demanding) | |
| scabrous(adjective, tough, rough, heavy) | |
| slavish(adjective, tough, rough, heavy) | |
| unpermissive(adjective, hard, severe, rough) |
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| APA | Smart Define. (2016). arduous thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2016, arduous thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>. |
| MLA | Smart Define. "arduous thesaurus" 26 February 2016. Web. 21 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms> |