150 entries under severe topic. ×
| disciplined | |
| dour | |
| draconian | |
| frore(adjective, cool, sharp, intense) | |
| frozen(adjective, cool, sharp, intense) | |
| fundamental | |
| gutsy(adjective, clear, tough, bright) | |
| have goose bumps(expression, idiom, cool, sharp) | |
| hawkish(adjective, cool, sharp, intense) | |
| hidebound | |
| icebox(adjective, cool, sharp, intense) | |
| iced(adjective, cool, sharp, intense) | |
| imperial | |
| lean | |
| numbed(adjective, cool, sharp, intense) | |
| obdurate | |
| one-dog night(expression, cool, sharp, intense) | |
| plucky(adjective, clear, tough, smart) | |
| pushy(adjective, clear, tough, happy) | |
| relentless |
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| APA | Smart Define. (2016). keen thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/keen/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "keen thesaurus" https://smartdefine.org/keen/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2016, keen thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/keen/thesaurus/synonyms>. |
| MLA | Smart Define. "keen thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/keen/thesaurus/synonyms> |