There are a number of different synonyms for the word "sheep-dog" that one might use, depending on the context and the specific breed of dog being referred to. Some possible alternatives might include "collie," "border collie," "Australian shepherd," "old English sheepdog," "bearded collie," "Shetland sheepdog," "Welsh corgi," or "Pembroke Welsh corgi." Each of these breeds has its own unique characteristics and traits that make it well-suited for herding and protecting sheep, and they all have distinctive appearances and temperaments that set them apart from one another. Regardless of which synonym is used, however, the sheep-dog remains an iconic and important part of farming and livestock management around the world.