Hebridean Islands vs Western Islands

Hebridean Islands and Western Islands both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hebridean Islands	Yes	No	No	No
Western Islands	Yes	No	No	No

As nouns, Hebridean Islands and Western Islands are synonyms defined as:

Hebridean Islands and Western Islands: a group of more than 500 islands off the western coast of Scotland

Other synonyms of Hebridean Islands include Hebridean Isles, Hebrides, Western Isles.

Hebridean Islands (noun)	Western Islands (noun)
a group of more than 500 islands off the western coast of Scotland	a group of more than 500 islands off the western coast of Scotland