- Definitions|1
- Thesaurus|302
- Abbreviations|0
| hairy(adjective, hard, tough, severe, rough) | |
| hard-earned | |
| hard-fought | |
| hard-won(tough, severe, painful, problematic, trying) | |
| hefty | |
| immense(tough, severe, painful, problematic, trying) | |
| intricate(adjective, tough, severe, difficult, awkward) | |
| involved(adjective, tough, rough, difficult, heavy) | |
| irksome(adjective, hard, tough, severe, rough) | |
| irritating(tough, severe, painful, problematic, trying) | |
| killer | |
| killing | |
| labor-intensive | |
| labour-intensive | |
| labourious | |
| leaden | |
| mean(adjective, hard, rough, difficult, heavy) | |
| murder(adjective, great, tough, rough, difficult) | |
| murderous | |
| no picnic(expression, tough, severe, painful, problematic) |
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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> |