Kulun vs Ulaanbaatar

Kulun and Ulaanbaatar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kulun	Yes	No	No	No
Ulaanbaatar	Yes	No	No	No

As nouns, Kulun and Ulaanbaatar are synonyms defined as:

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

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