Border collie and Sheep dog

Border collie noun - Developed in the area between Scotland and England usually having a black coat with white on the head and tip of tail used for herding both sheep and cattle.

Sheep dog and Border collie are semantically related. In some cases you can use "Sheep dog" instead a noun phrase "Border collie".

Sheep dog noun - Any of various usually long-haired breeds of dog reared to herd and guard sheep.

Border collie and sheep dog are semantically related. You can use "Border collie" instead a noun phrase "Sheep dog".