- Definitions|2
- Thesaurus|1.3k
- Abbreviations|0
115 entries under tough topic. ×
| unemotional(adjective, hard, severe, cold) | |
| unregenerate(adjective, hard, harsh, cruel) | |
| unremitting(adjective, hard, harsh, grim) | |
| unrepenting(adjective, hard, harsh, cruel) | |
| uphill battle(expression, adjective, rough, difficult) | |
| wearing(adjective, rough, difficult, heavy) | |
| wearying(adjective, rough, difficult, heavy) | |
| bothersome(adjective, rough, difficult, heavy) | |
| effortful(adjective, rough, difficult, heavy) | |
| herculean(adjective, rough, difficult, heavy) | |
| intricate(adjective, rough, difficult, heavy) | |
| labored(adjective, rough, difficult, heavy) | |
| operose(adjective, rough, difficult, heavy) | |
| uphill(adjective, rough, difficult, heavy) | |
| wearisome(adjective, rough, difficult, heavy) |
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| APA | Smart Define. (2016). merciless thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/merciless/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "merciless thesaurus" https://smartdefine.org/merciless/thesaurus/synonyms (accessed October 1, 2026). |
| Harvard | Smart Define 2016, merciless thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/merciless/thesaurus/synonyms>. |
| MLA | Smart Define. "merciless thesaurus" 31 March 2016. Web. 1 October 2026. <https://smartdefine.org/merciless/thesaurus/synonyms> |