Solomon Islands vs Guadalcanal

Solomon Islands and Guadalcanal both are nouns.

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

Solomon Islands (noun)	Guadalcanal (noun)
the southern Solomon Islands that since 1978 form an independent state in the British Commonwealth	a battle in World War II in the Pacific (1942-1943); the island was occupied by the Japanese and later recaptured by American forces
the northernmost islands are part of Papua New Guinea; the remainder form an independent state within the British Commonwealth	a mountainous island; the largest of the Solomon Islands in the independent state that is a member of the British Commonwealth