Hebridean Islands vs Western Isles

Hebridean Islands and Western Isles both are nouns.

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

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

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

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

Hebridean Islands (noun)	Western Isles (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