wilderness vs geographical area

wilderness and geographical area both are nouns.

Word	Noun	Adjective	Verb	Adverb
wilderness	Yes	No	No	No
geographical area	Yes	No	No	No

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

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

wilderness (noun)	geographical area (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