Roly-poly is a word that's often used to describe something that's round and chubby. However, there are many synonyms that can be used in its place. Some of these include chubby, plump, pudgy, corpulent, rotund, round, portly and fat. Each of these words describes something that's soft and round, but they can also be used to describe different things. For example, "portly" might be used to describe a person who's overweight but still appears dignified, while "plump" might refer to a cute animal like a hedgehog or a hamster. Overall, these synonyms can add variety to your writing and help you to avoid using the same word repeatedly.