12
arctic(adjective, cool, severe, keen, sharp)
9
glacial(adjective, cool, severe, keen, sharp)
8
freezing(adjective, cool, intense, cold, hot)
8
icy(adjective, cool, severe, keen, sharp)
8
wintry(adjective, cool, severe, keen, sharp)
7
frosty(adjective, cool, severe, keen, sharp)
7
north
7
northern(adjective, north, northerly)
7
polar(adjective, adverb, cool, severe, keen)
6
frigid(adjective, cool, severe, keen, sharp)
5
cold(adjective, adverb, cool, severe, keen)
4
hyperborean(adjective, cool, severe, keen, sharp)
4
bitter(adjective, cool, severe, keen, sharp)
4
bleak(adjective, cool, severe, keen, sharp)
4
brumal(adjective, cool, severe, keen, sharp)
4
circumboreal
3
antarctic
3
biting(adjective, cool, severe, keen, sharp)
3
frore(adjective, cool, severe, keen, sharp)
3
frozen(adjective, adverb, cool, severe, keen)
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APASmart Define. (2015). boreal thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/boreal/thesaurus/synonyms
ChicagoSmart Define. 2015. "boreal thesaurus" https://smartdefine.org/boreal/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, boreal thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/boreal/thesaurus/synonyms>.
MLASmart Define. "boreal thesaurus" 7 July 2015. Web. 22 September 2026. <https://smartdefine.org/boreal/thesaurus/synonyms>