Holm is a term that is often used to describe small islands or islets. However, there are several other words that can be used as synonyms for holm. Some examples include islet, eyot, ait, skerry, and key. These words are used interchangeably to refer to small land masses found in rivers, lakes, or seas. Islet is perhaps the most common of all these synonyms as it can also be used to describe any small island. Eyot and ait, meanwhile, are often used to describe small islands that are located in rivers. Skerry, on the other hand, refers to small rocky islands found in the sea while the word "key" is more frequently used to describe small islands in the Caribbean.