dust bowl vs geographic area

dust bowl and geographic area both are nouns.

Word	Noun	Adjective	Verb	Adverb
dust bowl	Yes	No	No	No
geographic area	Yes	No	No	No

As nouns, geographic area is a hypernym of dust bowl; that is, geographic area is a word with a broader meaning than dust bowl:

dust bowl: a region subject to dust storms; especially the central region of United States subject to dust storms in the 1930s
geographic area: a demarcated area of the Earth

Other hypernyms of dust bowl include geographic region, geographical area, geographical region.

dust bowl (noun)	geographic area (noun)
a region subject to dust storms; especially the central region of United States subject to dust storms in the 1930s	a demarcated area of the Earth