geographic region vs geographic area

geographic region and geographic area both are nouns.

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

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

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

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