soil vs geographic region

soil and geographic region both are nouns.

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

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

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

soil (noun)	geographic region (noun)
the geographical area under the jurisdiction of a sovereign state	a demarcated area of the Earth
material in the top layer of the surface of the earth in which plants can grow (especially with reference to its quality or use)
anything regarded as making something unclean
the part of the earth's surface consisting of humus and disintegrated rock

soil (verb)	geographic region (verb)
make soiled, filthy, or dirty