Piggin is a term that is commonly used to refer to a small wooden or metal bucket. However, there are a variety of synonyms that can be used in place of the word piggin. Some alternative terms that can be used to describe a small bucket include pail, bucket, receptacle, container, vessel, bin, tub, and basin among others. These synonyms can provide a more diverse vocabulary choice when describing a bucket-like object. It is important to note that the choice of synonym will depend on the context and purpose of the object being described.