There are various synonyms for the term "companion vase". Some of the common synonyms include "matching vase", "corresponding vase", "paired vase" and "partner vase". Also, "dual vases", "two-piece vase" and "couple vase" can be used to refer to a set of matching vases. Companion vases are usually identical in design, shape, and size, and are used to create a beautiful and balanced display together. These vases can be made from different materials like glass, ceramic, and metal. Their usage is common in interior decor to add an extra appeal to aesthetic display and in events to bring a uniform feel.