Frigid Zone vs climatic zone

Frigid Zone and climatic zone both are nouns.

Word	Noun	Adjective	Verb	Adverb
Frigid Zone	Yes	No	No	No
climatic zone	Yes	No	No	No

As nouns, climatic zone is a hypernym of Frigid Zone; that is, climatic zone is a word with a broader meaning than Frigid Zone:

Frigid Zone: the part of the Earth's surface forming a cap over a pole; characterized by frigid climate
climatic zone: any of the geographical zones loosely divided according to prevailing climate and latitude

Frigid Zone (noun)	climatic zone (noun)
the part of the Earth's surface forming a cap over a pole; characterized by frigid climate	any of the geographical zones loosely divided according to prevailing climate and latitude