subtropics vs climatic zone

subtropics and climatic zone both are nouns.

Word	Noun	Adjective	Verb	Adverb
subtropics	Yes	No	No	No
climatic zone	Yes	No	No	No

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

subtropics: regions adjacent to the tropics
climatic zone: any of the geographical zones loosely divided according to prevailing climate and latitude

subtropics (noun)	climatic zone (noun)
regions adjacent to the tropics	any of the geographical zones loosely divided according to prevailing climate and latitude