- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
134 entries under difficult topic. ×
| irksome(adjective, dull, difficulty, heavy) | |
| murderous | |
| cantankerous | |
| finicky(adjective, tough, problematic, trying) | |
| fussy(adjective, hard, tough, problematic) | |
| tiresome(adjective, hard, tough, severe) | |
| abstruse(adjective, hard, fancy, complex) | |
| adverse | |
| contrary | |
| dense(adjective, complex, intricate, thorny) | |
| difficile(adjective, tough, severe, rough) | |
| exigent(adjective, heavy, taxing) | |
| hairy(adjective, hard, severe, rough) | |
| mean(adjective, hard, severe, rough) | |
| stern(adjective, hard, severe, rough) | |
| vexatious(adjective, dull, tender, boring) | |
| Daedalean(adjective, hard, fancy, complex) | |
| backbreaker(hard, tough, severe, painful) | |
| can of worms(expression, adjective, idiom, hard, fancy) | |
| convoluted(adjective, hard, fancy, complex) |
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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> |