- Definitions|2
- Thesaurus|383
- Abbreviations|0
| steep | |
| stiff(tough, severe, difficult, painful, problematic) | |
| strained | |
| straining | |
| strictly business(expression, adjective, tough, severe, important) | |
| thoroughgoing | |
| ticklish | |
| tireless | |
| unamusing(adjective, tough, severe, important, significant) | |
| unhumorous(adjective, tough, severe, important, deep) | |
| unyielding(tough, severe, painful, problematic, trying) | |
| upstream(tough, severe, painful, problematic, trying) | |
| wearing(adjective, hard, tough, rough, difficult) | |
| wicked | |
| worrying(adjective, tough, severe, important, significant) | |
| argumentative(tough, problematic, trying) | |
| attentive | |
| awkward(adjective, difficult, demanding, grueling, problematical) | |
| back-breaking | |
| ball of fire |
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| APA | Smart Define. (2015). operose thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/operose/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "operose thesaurus" https://smartdefine.org/operose/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, operose thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/operose/thesaurus/synonyms>. |
| MLA | Smart Define. "operose thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/operose/thesaurus/synonyms> |