semidesert vs geographic area

semidesert and geographic area both are nouns.

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

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

semidesert: a region much like a desert but usually located between a desert and the surrounding regions
geographic area: a demarcated area of the Earth

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

semidesert (noun)	geographic area (noun)
a region much like a desert but usually located between a desert and the surrounding regions	a demarcated area of the Earth