geographic area vs geographic region

geographic area and geographic region both are nouns.

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

As nouns, geographic area and geographic region are synonyms defined as:

Other synonyms of geographic area include geographical area, geographical region.

geographic area (noun)	geographic region (noun)
a demarcated area of the Earth	a demarcated area of the Earth