Transylvania vs region

Transylvania and region both are nouns.

Word	Noun	Adjective	Verb	Adverb
Transylvania	Yes	No	No	No
region	Yes	No	No	No

Transylvania (noun)	region (noun)
a historical plateau region in northwestern Romania that is separated from the rest of the country by the Transylvanian Alps; originally part of Hungary; incorporated into Romania at the end of World War I	a part of an animal that has a special function or is supplied by a given artery or nerve
	a knowledge domain that you are interested in or are communicating about
	the extended spatial location of something
	a large indefinite location on the surface of the Earth
	the approximate amount of something (usually used prepositionally as in `in the region of')