Western Samoa vs Samoa i Sisifo

Western Samoa and Samoa i Sisifo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Western Samoa	Yes	No	No	No
Samoa i Sisifo	Yes	No	No	No

As nouns, Western Samoa and Samoa i Sisifo are synonyms defined as:

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

Other synonyms of Western Samoa include Independent State of Samoa, Samoa.

Western Samoa (noun)	Samoa i Sisifo (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