Alto-cumulus clouds are a particularly fascinating sight in the sky, and there are various other names by which they are commonly known. These clouds are often called 'sheep backs,' since their rounded shapes resemble the backs of sheep grazing in a field. They're also often called 'grandstanders,' since they're known to gather in large groups and put on a show for anyone who happens to be watching. Some other synonyms for alto-cumulus clouds include 'rosette clouds,' 'floccus clouds,' and 'sailor's delight clouds.' No matter what you prefer to call them, alto-cumulus clouds are a breathtaking natural wonder that continue to awe and inspire people from all corners of the world.