Hebrides vs Western Isles

Hebrides and Western Isles both are nouns.

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

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

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

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

Hebrides (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