Hebridean Isles vs Western Isles

Hebridean Isles and Western Isles both are nouns.

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

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

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

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

Hebridean Isles (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