150 entries under severe topic. ×
| hyperborean(adjective, cool, sharp, intense) | |
| intolerant(adjective, violent, enthusiastic, anxious) | |
| meticulous(adjective, careful) | |
| resolute(adjective, clear, tough, intense) | |
| tough(adjective, clear, excellent, fine) | |
| whetted(adjective, sharp, fine, acute) | |
| below zero(expression, cool, sharp, intense) | |
| blunt | |
| boreal(adjective, cool, sharp, intense) | |
| brusque(adjective, violent, anxious, eager) | |
| chilled(adjective, cool, sharp, intense) | |
| courageous(adjective, clear, tough, bright) | |
| curt(adjective, energetic, violent, active) | |
| grim | |
| gruff | |
| hiemal(adjective, cool, sharp, intense) | |
| inflexible | |
| obstinate(adjective, fervent, zealous, dedicated) | |
| oppressive | |
| polar(adjective, cool, sharp, intense) |
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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> |