Fiji vs Fiji Islands

Fiji and Fiji Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fiji	Yes	No	No	No
Fiji Islands	Yes	No	No	No

Fiji (noun)	Fiji Islands (noun)
an independent state within the British Commonwealth located on the Fiji Islands	a group of more than 800 islands (100 inhabited) in the southwestern Pacific; larger islands (Viti Levu and Vanua Levu) are of volcanic origin surrounded by coral reefs; smaller islands are coral