Western Samoa vs Independent State of Samoa

Western Samoa and Independent State of Samoa both are nouns.

Word	Noun	Adjective	Verb	Adverb
Western Samoa	Yes	No	No	No
Independent State of Samoa	Yes	No	No	No

As nouns, Western Samoa and Independent State of Samoa are synonyms defined as:

Western Samoa and Independent State of Samoa: a constitutional monarchy on the western part of the islands of Samoa in the South Pacific

Other synonyms of Western Samoa include Samoa, Samoa i Sisifo.

Western Samoa (noun)	Independent State of Samoa (noun)
a constitutional monarchy on the western part of the islands of Samoa in the South Pacific	a constitutional monarchy on the western part of the islands of Samoa in the South Pacific