- Definitions|2
- Thesaurus|817
- Abbreviations|0
41 entries under severe topic. ×
| formidable(adjective, tough, difficult, awkward) | |
| demanding(adjective, hard, tough, difficult) | |
| arduous(adjective, hard, great, tough) | |
| laborious(adjective, great, tough, difficult) | |
| stiff(tough, painful, demanding, problematic) | |
| trying(adjective, hard, tough, difficult) | |
| burdensome(adjective, tough, difficult, awkward) | |
| effortful(adjective, great, tough, difficult) | |
| exacting(adjective, hard, tough, difficult) | |
| onerous(adjective, hard, great, tough) | |
| strenuous(adjective, great, tough, difficult) | |
| titanic(tough, painful, problematic, trying) | |
| toilsome(adjective, great, tough, difficult) | |
| tough(adjective, great, difficult, painful) | |
| unyielding(adjective, tough, painful, problematic) | |
| backbreaker(hard, tough, difficult, painful) | |
| bothersome(adjective, hard, tough, difficult) | |
| crucial(tough, painful, problematic, trying) | |
| difficile(adjective, tough, difficult, awkward) | |
| easier said than done(expression, tough, painful, problematic) |
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| APA | Smart Define. (2016). challenging thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/challenging/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "challenging thesaurus" https://smartdefine.org/challenging/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, challenging thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/challenging/thesaurus/synonyms>. |
| MLA | Smart Define. "challenging thesaurus" 2 March 2016. Web. 22 September 2026. <https://smartdefine.org/challenging/thesaurus/synonyms> |