- Definitions|2
- Thesaurus|383
- Abbreviations|0
| pertinacious | |
| perverse(tough, problematic, trying) | |
| picky(tough, problematic, trying) | |
| problematical(adjective, difficult, awkward, demanding, grueling) | |
| productive | |
| psyched up on | |
| purposeful | |
| refractory(tough, problematic, trying) | |
| rude(tough, problematic, trying) | |
| scabrous(adjective, tough, rough, difficult, heavy) | |
| sooner | |
| sound | |
| spirited | |
| steadfast | |
| steady | |
| studious | |
| terrible(adjective, tough, rough, difficult, heavy) | |
| testing(adjective, tough, severe, difficult, violent) | |
| threatening | |
| tiresome(hard, tough, difficult, problematic, arduous) |
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| APA | Smart Define. (2015). operose thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/operose/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "operose thesaurus" https://smartdefine.org/operose/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, operose thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/operose/thesaurus/synonyms>. |
| MLA | Smart Define. "operose thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/operose/thesaurus/synonyms> |