Kulun vs capital of Mongolia

Kulun and capital of Mongolia both are nouns.

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

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

Other synonyms of Kulun include Ulaanbaatar, Ulan Bator, Urga.

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