Old English sheepdog and Shepherd dog

Old English sheepdog noun - Large sheepdog with a profuse shaggy bluish-grey-and-white coat and short tail; believed to trace back to the Roman occupation of Britain.

Shepherd dog and Old English sheepdog are semantically related. In some cases you can use "Shepherd dog" instead a noun phrase "Old English sheepdog".

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

Old English sheepdog and shepherd dog are semantically related. Sometimes you can replace phrase "Old English sheepdog" with "Shepherd dog", this phrases are similar.