capital of Mongolia vs Kulun

capital of Mongolia and Kulun both are nouns.

Word	Noun	Adjective	Verb	Adverb
capital of Mongolia	Yes	No	No	No
Kulun	Yes	No	No	No

As nouns, capital of Mongolia and Kulun are synonyms defined as:

Other synonyms of capital of Mongolia include Ulaanbaatar, Ulan Bator, Urga.

capital of Mongolia (noun)	Kulun (noun)
the capital and largest city of Mongolia	the capital and largest city of Mongolia