- Definitions|1
- Thesaurus|302
- Abbreviations|0
| hellacious | |
| impolite(tough, problematic, trying) | |
| intractable(tough, problematic, trying) | |
| irritable(tough, problematic, trying) | |
| merciless(adjective, tough, rough, difficult, heavy) | |
| moiling | |
| oafish(tough, problematic, trying) | |
| obstreperous(tough, problematic, trying) | |
| painstaking | |
| perverse(tough, problematic, trying) | |
| pick-and-shovel | |
| picky(tough, problematic, trying) | |
| refractory(tough, problematic, trying) | |
| rude(tough, problematic, trying) | |
| scabrous(adjective, tough, rough, difficult, heavy) | |
| slavish(adjective, tough, rough, difficult, heavy) | |
| strive | |
| strived | |
| striven | |
| strives |
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| APA | Smart Define. (2015). effortful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/effortful/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "effortful thesaurus" https://smartdefine.org/effortful/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, effortful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/effortful/thesaurus/synonyms>. |
| MLA | Smart Define. "effortful thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/effortful/thesaurus/synonyms> |