59 entries under problematic topic. ×
| backbreaker(tough, trying) | |
| bearish(tough, grim, trying, troublesome) | |
| boorish(tough, grim, trying, troublesome) | |
| bothersome(tough, trying, disorderly, unruly) | |
| burdensome(tough, trying, disorderly, unruly) | |
| crucial(tough, trying) | |
| difficile(tough, trying) | |
| easier said than done(expression, idiom, tough, trying) | |
| effortful(tough, trying) | |
| fastidious(tough, grim, trying, troublesome) | |
| finicky(tough, trying) | |
| fussy(tough, trying) | |
| galling(tough, trying) | |
| gargantuan(tough, trying) | |
| grueling(tough, trying) | |
| hard-won(tough, trying) | |
| hard to please(expression, idiom, tough, grim) | |
| herculean(tough, trying) | |
| immense(tough, trying) | |
| impolite(tough, grim, trying, troublesome) |
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| APA | Smart Define. (2015). refractory thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/refractory/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "refractory thesaurus" https://smartdefine.org/refractory/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, refractory thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/refractory/thesaurus/synonyms>. |
| MLA | Smart Define. "refractory thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/refractory/thesaurus/synonyms> |