Transcaucasia vs geographic area

Transcaucasia and geographic area both are nouns.

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

Transcaucasia (noun)	geographic area (noun)
a geographical region to the south of the Caucasus Mountains and to the north of Turkey that comprises Georgia and Armenia and Azerbaijan	a demarcated area of the Earth