Stuffers, the word that describes something packed or filled inside another thing, can be substituted by different synonyms. For instance, the word "fillers" refers to something that occupies a space or adds volume to an object. The word "stuffings," on the other hand, pertains to material or mixture used to fill something like cushions or toys. Another synonym is "packing," which refers to the material used to wrap or cushion things for shipment. Lastly, "contents" refers to the things that are already inside an object. These synonyms are useful to use in different contexts, such as in packaging, cooking, and crafts.