Nan Mountains vs Nan Ling

Nan Mountains and Nan Ling both are nouns.

Word	Noun	Adjective	Verb	Adverb
Nan Mountains	Yes	No	No	No
Nan Ling	Yes	No	No	No

As nouns, Nan Mountains and Nan Ling are synonyms defined as:

Nan Mountains and Nan Ling: a mountain range in southeastern China running generally east to west

Nan Mountains (noun)	Nan Ling (noun)
a mountain range in southeastern China running generally east to west	a mountain range in southeastern China running generally east to west