Shetland vs Shetland sheep dog

Shetland and Shetland sheep dog both are nouns.

Word	Noun	Adjective	Verb	Adverb
Shetland	Yes	No	No	No
Shetland sheep dog	Yes	No	No	No

As nouns, Shetland and Shetland sheep dog are synonyms defined as:

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

Other synonyms of Shetland include Shetland sheepdog.

Shetland (noun)	Shetland sheep dog (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