As proper nouns the difference between azerbaijan and transcaucasia
is that azerbaijan
is a country in west asia; official name: republic of azerbaijan while transcaucasia
is (region of southwest asia
(en proper noun
a country in West Asia; official name: Republic of Azerbaijan
Mountainous region of southwest Asia, lying south of Caucasus Mountains and comprising republics of Georgia, Armenia and Azerbaijan. Also known as South Caucasus.
* South Caucasus