Hunan vs Hunan province

Hunan and Hunan province both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hunan	Yes	No	No	No
Hunan province	Yes	No	No	No

As nouns, Hunan and Hunan province are synonyms defined as:

Hunan and Hunan province: a province in southeastern central China between the Nan Ling mountains and the Chang Jiang; noted for its timber and valuable mineral resources

Hunan (noun)	Hunan province (noun)
a province in southeastern central China between the Nan Ling mountains and the Chang Jiang; noted for its timber and valuable mineral resources	a province in southeastern central China between the Nan Ling mountains and the Chang Jiang; noted for its timber and valuable mineral resources