geographic region vs Austria-Hungary

geographic region and Austria-Hungary both are nouns.

Word	Noun	Adjective	Verb	Adverb
geographic region	Yes	No	No	No
Austria-Hungary	Yes	No	No	No

geographic region (noun)	Austria-Hungary (noun)
a demarcated area of the Earth	a geographical area in central and eastern Europe; broken into separate countries at the end of World War I