- Definitions|2
- Thesaurus|856
- Abbreviations|0
106 entries under tough topic. ×
| unsparing(adjective, mean, strong, hard) | |
| astringent(adjective, strong, hard, severe) | |
| austere(adjective, appearance, mean, strong, hard) | |
| authoritarian(adjective, strong, hard, severe) | |
| avaricious(adjective, hard, harsh, cruel) | |
| bloody(adjective, hard, harsh, cruel) | |
| bullhead(adjective, mean, hard, harsh) | |
| by the book(expression, adjective, idiom, strong, hard) | |
| disciplinary(adjective, strong, hard, severe) | |
| dyed-in-the-wool(adjective, set, strong, hard) | |
| forbidding(adjective, appearance, strong, hard) | |
| frowning(adjective, strong, hard, severe) | |
| hang-tough(adjective, strong, hard, harsh) | |
| hard-line(adjective, strong, hard, severe) | |
| heavy(adjective, strong, hard, harsh) | |
| impenitent(adjective, hard, harsh, cruel) | |
| insensible(adjective, mean, strong, hard) | |
| intolerant(adjective, hard, harsh, cruel) | |
| mortified(adjective, strong, hard, severe) | |
| murderous(adjective, hard, harsh, violent) |
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| APA | Smart Define. (2016). implacable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/implacable/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "implacable thesaurus" https://smartdefine.org/implacable/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, implacable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/implacable/thesaurus/synonyms>. |
| MLA | Smart Define. "implacable thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/implacable/thesaurus/synonyms> |