wilderness vs geographic region

wilderness and geographic region both are nouns.

Word	Noun	Adjective	Verb	Adverb
wilderness	Yes	No	No	No
geographic region	Yes	No	No	No

As nouns, geographic region is a hypernym of wilderness; that is, geographic region is a word with a broader meaning than wilderness:

Other hypernyms of wilderness include geographic area, geographical area, geographical region.

wilderness (noun)	geographic region (noun)
a bewildering profusion	a demarcated area of the Earth
a wild and uninhabited area left in its natural condition
(politics) a state of disfavor