Tea cosy is a term commonly used to refer to a cloth covering that is placed over a teapot to keep it warm while the tea steeps. However, there are several other synonyms that can be used to refer to the same object. Some of these include tea cozy, teapot cover, teapot warmer, tea cozy sleeve, tea cozy holder, and tea jacket. All these synonyms serve to describe the same function and are interchangeable, offering a variety of options to choose from when it comes to keeping your tea warm and snug. Ultimately, the name used will depend on individual preferences and cultural or regional variations.