Shetland vs Shetland sheepdog

Shetland and Shetland sheepdog both are nouns.

Word	Noun	Adjective	Verb	Adverb
Shetland	Yes	No	No	No
Shetland sheepdog	Yes	No	No	No

As nouns, Shetland and Shetland sheepdog are synonyms defined as:

Shetland and Shetland sheepdog: a small sheepdog resembling a collie that was developed in the Shetland Islands

Other synonyms of Shetland include Shetland sheep dog.

Shetland (noun)	Shetland sheepdog (noun)
a small sheepdog resembling a collie that was developed in the Shetland Islands	a small sheepdog resembling a collie that was developed in the Shetland Islands
an archipelago of about 100 islands in the North Atlantic off the north coast of Scotland