Synonyms for Antarctic (same or very similar meaning)
WordNet sense 1 (the region around the south pole: Antarctica and surrounding waters):
Antarctic Zone, South Frigid Zone
WordNet sense 2 (at or near the south pole):
south-polar
WordNet sense 3 (of or existing at or near a geographical pole or within the Arctic or Antarctic Circles):
polar
From the ODE community, based on WordNet
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