Freetown vs capital of Sierra Leone

Freetown and capital of Sierra Leone both are nouns.

Word	Noun	Adjective	Verb	Adverb
Freetown	Yes	No	No	No
capital of Sierra Leone	Yes	No	No	No

As nouns, Freetown and capital of Sierra Leone are synonyms defined as:

Freetown and capital of Sierra Leone: port city and the capital and largest city of Sierra Leone

Freetown (noun)	capital of Sierra Leone (noun)
port city and the capital and largest city of Sierra Leone	port city and the capital and largest city of Sierra Leone