- Definitions|2
- Thesaurus|1.9k
- Abbreviations|0
153 entries under tough topic. ×
| arduous(adjective, dull, great, severe) | |
| laborious(adjective, dull, hard, great) | |
| toilsome(adjective, great, severe, difficult) | |
| difficult(adjective, dull, hard, great) | |
| hard(adjective, dull, great, severe) | |
| active(adjective, action, strong, difficult) | |
| energetic(adjective, action, strong, smart) | |
| onerous(adjective, dull, great, difficult) | |
| vigorous(adjective, action, strong, smart) | |
| burdensome(adjective, dull, severe, difficult) | |
| demanding(adjective, dull, hard, severe) | |
| tiring(adjective, dull, difficult, full) | |
| spirited(adjective, strong, difficult, energetic) | |
| zealous(adjective, activity, strong, smart) | |
| dynamic(adjective, action, strong, smart) | |
| exacting(adjective, dull, severe, rough) | |
| forceful(adjective, action, strong, smart) | |
| strong(adjective, difficult, energetic, powerful) | |
| formidable(adjective, severe, rough, difficult) | |
| uphill(adjective, hard, great, severe) |
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| APA | Smart Define. (2016). strenuous thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/strenuous/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "strenuous thesaurus" https://smartdefine.org/strenuous/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2016, strenuous thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/strenuous/thesaurus/synonyms>. |
| MLA | Smart Define. "strenuous thesaurus" 1 April 2016. Web. 27 September 2026. <https://smartdefine.org/strenuous/thesaurus/synonyms> |