Solomon Islands vs Solomon Islands

Solomon Islands and Solomon Islands both are nouns.

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

Solomon Islands (noun)	Solomon Islands (noun)
the southern Solomon Islands that since 1978 form an independent state in the British Commonwealth	the southern Solomon Islands that since 1978 form an independent state in the British Commonwealth
the northernmost islands are part of Papua New Guinea; the remainder form an independent state within the British Commonwealth	the northernmost islands are part of Papua New Guinea; the remainder form an independent state within the British Commonwealth