- Definitions|2
- Thesaurus|2.1k
- Abbreviations|0
84 entries under tough topic. ×
| difficult(adjective, dull, hard, great) | |
| hard(adjective, dull, great, easy) | |
| laborious(adjective, dull, hard, great) | |
| toilsome(adjective, hard, great, difficulty) | |
| burdensome(adjective, dull, hard, severe) | |
| severe(adjective, hard, rough, difficult) | |
| strenuous(adjective, dull, great, severe) | |
| operose(adjective, hard, severe, difficulty) | |
| rough(adjective, hard, great, severe) | |
| trying(adjective, dull, hard, severe) | |
| oppressive(adjective, dull, hard, severe) | |
| taxing(adjective, hard, severe, rough) | |
| serious(adjective, hard, easy, difficult) | |
| exhausting(adjective, dull, hard, difficult) | |
| onerous(adjective, dull, hard, great) | |
| problematic(adjective, hard, difficult, complex) | |
| grueling(adjective, hard, severe, difficult) | |
| troublesome(adjective, hard, difficulty, difficult) | |
| uphill(adjective, hard, great, easy) | |
| demanding(adjective, dull, hard, severe) |
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| APA | Smart Define. (2016). arduous thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/arduous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "arduous thesaurus" https://smartdefine.org/arduous/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2016, arduous thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/arduous/thesaurus/synonyms>. |
| MLA | Smart Define. "arduous thesaurus" 26 February 2016. Web. 26 September 2026. <https://smartdefine.org/arduous/thesaurus/synonyms> |